The Clean Water Act (CWA) is the primary federal law in the United States governing water pollution. Its objective is to restore and maintain the chemical, physical, and biological integrity of the nation's waters by preventing point and nonpoint pollution sources (though it does not enable the control of nonpoint sources); recognizing the responsibilities of the states in addressing pollution and providing assistance to states to do so, including funding for publicly owned treatment works for the improvement of wastewater treatment; and maintaining the integrity of wetlands. It is one of the United States' first and most influential modern environmental laws. As with many other major U.S. federal environmental statutes, it is administered by the U.S. Environmental Protection Agency (EPA), in coordination with state governments. Its implementing regulations are codified at 40 C.F.R. Subchapters D, N, and O (Parts 100-140, 401-471, and 501-503).
Technically, the name of the law is the Federal Water Pollution Control Act. The first FWPCA was enacted in 1948, but took on its modern form when completely rewritten in 1972 in an act entitled the Federal Water Pollution Control Act Amendments of 1972. Major changes have subsequently been introduced via amendatory legislation including the Clean Water Act of 1977 and the Water Quality Act of 1987.
The Clean Water Act does not directly address groundwater contamination. Groundwater protection provisions are included in the Safe Drinking Water Act, Resource Conservation and Recovery Act, and the Superfund act.
|Clean Water Act|
|Other short titles||Federal Water Pollution Control Act Amendments of 1972|
|Long title||An Act to amend the Federal Water Pollution Control Act.|
|Enacted by||the 92nd United States Congress|
|Effective||October 18, 1972|
|Statutes at Large||86 Stat. 816|
|Acts amended||Federal Water Pollution Control Act|
|Titles amended||33 U.S.C.: Navigable Waters|
|U.S.C. sections created||33 U.S.C. §§ 1251–1387|
|U.S.C. sections amended||33 U.S.C. ch. 23 § 1151|
|Clean Water Act of 1977; Water Quality Act of 1987|
|United States Supreme Court cases|
Contamination of drinking water supplies can not only occur in the source water but also in the distribution system. Sources of water contamination include naturally occurring chemicals and minerals (arsenic, radon, uranium), local land use practices (fertilizers, pesticides, concentrated feeding operations), manufacturing processes, and sewer overflows or wastewater releases. Some examples of health implications of water contamination are gastrointestinal illness, reproductive problems, and neurological disorders. Infants, young children, pregnant women, the elderly, and people whose immune systems are compromised because of AIDS, chemotherapy, or transplant medications, may be especially susceptible to illness from some contaminants.
Gastrointestinal disorders include such conditions as constipation, irritable bowel syndrome, hemorrhoids, anal fissures, perianal abscesses, anal fistulas, perianal infections, diverticular diseases, colitis, colon polyps and cancer. In general, children and the elderly are at highest risk for gastrointestinal disease. In a study investigating the association between drinking water quality and gastrointestinal illness in the elderly of Philadelphia, scientists found water quality 9 to 11 days before the visit was negatively associated with hospital admissions for gastrointestinal illness, with an interquartile range increase in turbidity being associated with a 9% increase). The association was stronger in those over 75 than in the population aged 65–74. This example is a small reflection of residents of the United States remain at risk of waterborne gastrointestinal illness under current water treatment practices.
Reproductive problems refer to any illness of the reproductive system. New research by Brunel University and the University of Exeter strengthens the relationship between water pollution and rising male fertility problems. Study identified a group of chemicals that act as anti-androgens in polluted water, which inhibits the function of the male hormone, testosterone, reducing male fertility.
Neurological disorders are diseases of the brain, spine and the nerves that connect them. The new study of more than 700 people in California’s Central Valley found that those who likely consumed contaminated private well water had a higher rate of Parkinson’s. The risk was 90 percent higher for those who had private wells near fields sprayed with widely used insecticides. Unlike water supplies in large cities, private wells are mostly unregulated and are not monitored for contaminants. Many of them exist at shallow depths of less than 20 yards, and some of the crop chemicals used to kill pests and weeds can flow into ground water. Therefore, private wells are likely to contain pesticides, which can attack developing brains (womb or infancy), leading to neurological diseases later in life. A study led by UCLA epidemiology professor Beate Ritz suggests that "people with Parkinson’s were more likely to have consumed private well water, and had consumed it on average 4.3 years longer than those who did not have the disease."
All waters with a "significant nexus" to "navigable waters" are covered under the CWA; however, the phrase "significant nexus" remains open to judicial interpretation and considerable controversy. The 1972 statute frequently uses the term "navigable waters" but also defines the term as "waters of the United States, including the territorial seas." Some regulations interpreting the 1972 law have included water features such as intermittent streams, playa lakes, prairie potholes, sloughs and wetlands as "waters of the United States." In 2006, in Rapanos v. United States, a plurality of the US Supreme Court held that the term "waters of the United States" "includes only those relatively permanent, standing or continuously flowing bodies of water 'forming geographic features' that are described in ordinary parlance as 'streams[,]... oceans, rivers, [and] lakes.'"
Point sources may not discharge pollutants to surface waters without a permit from the National Pollutant Discharge Elimination System (NPDES). That system is managed by the US Environmental Protection Agency (EPA) in partnership with state environmental agencies. EPA has authorized 47 states to issue permits directly to the discharging facilities. The CWA also allows tribes to issue permits, but no tribes have been authorized by EPA. In the remaining states and territories, the permits are issued by an EPA regional office. (See Titles III and IV.)
In previous legislation, Congress had authorized states to develop water quality standards, which would limit discharges from facilities based on the characteristics of individual water bodies. However, those standards were to be developed only for interstate waters, and the science to support that process (i.e. data, methodology) was in the early stages of development. That system was not effective, and there was no permit system in place to enforce the requirements. In the 1972 CWA, Congress added the permit system and a requirement for technology-based effluent limitations.
The 1972 CWA created a new requirement for technology-based standards for point source discharges. The EPA develops those standards for categories of dischargers, based on the performance of pollution control technologies without regard to the conditions of a particular receiving water body. The intent of Congress was to create a "level playing field" by establishing a basic national discharge standard for all facilities within a category, using a "Best Available Technology." The standard becomes the minimum regulatory requirement in a permit. If the national standard is not sufficiently protective at a particular location, then water quality standards may be employed.
The 1972 act authorized continued use of the water quality-based approach, but in coordination with the technology-based standards. After application of technology-based standards to a permit, if water quality is still impaired for the particular water body, then the permit agency (state or EPA) may add water quality-based limitations to that permit. The additional limitations are to be more stringent than the technology-based limitations and would require the permittee to install additional controls. Water quality standards consist of four basic elements: 1) Designated uses; 2) Water quality criteria; 3) Antidegradation policy and 4) General policies.
According to water quality standard regulations, federally recognized tribes/nations and states are required to specify appropriate water uses. Identification of appropriate water uses takes into consideration the usage and value of public water supply, protection of fish, wildlife, recreational waters, agricultural, industrial and navigational water ways. Suitability of a water body is examined by states and tribes/nations usages based on physical, chemical, and biological characteristics. States and tribes/nations also examine geographical settings, scenic qualities and economic considerations to determine fitness of designated uses for water bodies. If those standards indicate designated uses to be less than those currently attained, states or tribes are required to revise standards to reflect the uses thaf are actually being attained. For any body of water with designated uses that do not include "fishable/swimmable" target use that is identified in section 101(a)(2) of CWA, a "Use Attainability Analysis" must be conducted. Every three years, such bodies of water must be re-examined to verify if new information is available that demand a revision of the standard. If new information is available that specify “fishable/swimmable” uses can be attained, the use must be designated.
Federally recognized Indigenous Nations and states protect designated areas by adopting water quality criteria that the EPA publishes under §304(a) of the CWA, modifying the §304(a) criteria to reflect site-specific conditions or adopting criteria based on other scientifically defensible methods. Water quality criteria can be numeric criteria that toxicity causes are known for protection against pollutants. A narrative criterion is water quality criteria which serves as a basis for limiting the toxicity of waste discharges to aquatic species. A biological criterion is based on the aquatic community which describes the number and types of species in a water body. A nutrient criterion solely protects against nutrient over enrichment, and a sediment criterion describes conditions of contaminated and uncontaminated sediments in order to avoid undesirable effects.
Water quality standards consist of an anti-degradation policy that requires states and tribes to establish a three-tiered anti-degradation program. Anti-degradation procedures identify steps and questions that need to be addressed when specific activities affect water quality. Tier 1 is applicable to all surface waters. It maintains and protects current uses and water quality conditions to support existing uses. Current uses are identified by showing that fishing, swimming, and other water uses have occurred and are suitable since November 28, 1975. Tier 2 maintains and protects water bodies with existing conditions that are better to support CWA 101(a)(2) "fishable/swimmable" uses. Tier 3 maintains and protects water quality in outstanding national resource waters (ONRWs), which are the highest quality waters in the US with ecological significance.
States and Indian tribes adopt general policies pertaining to water quality standards that are subject to review and approval by the EPA. Those provisions on water quality standards include mixing zones, variance, and low flow policies. Mixing zone policy is defined area surrounding a point source discharge where sewage is diluted by water. Methodology of mixing zone procedure determines the location, size, shape and quality of mixing zones. Variance policy temporarily relax water quality standard and are alternatives to removing a designated use. States and tribes may include variance as part of their water quality standard. Variance is subject to public review every three years and warrant development towards improvement of water quality. Low Flow policy pertains to states and tribes water quality standards that identify procedures applied to determining critical low flow conditions.
Congress exempted some water pollution sources from the point source definition in the 1972 CWA and was unclear on the status of some other sources. Such sources were therefore considered to be nonpoint sources that were not subject to the permit program.
Agricultural stormwater discharges and irrigation return flows were specifically exempted from permit requirements. Congress, however, provided support for research, technical and financial assistance programs at the U.S. Department of Agriculture to improve runoff management practices on farms. See Natural Resources Conservation Service.
Stormwater runoff from industrial sources, municipal storm drains, and other sources were not specifically addressed in the 1972 law. The EPA declined to include urban runoff and industrial stormwater discharges in the NPDES program and so was sued by an environmental group. In 1977, the D.C. Circuit Court of Appeals ruled that stormwater discharges must be covered by the permit program.
Research conducted starting in the late 1970s and 1980s indicated that stormwater runoff was a significant cause of water quality impairment in many parts of the US. In the early 1980s, the EPA conducted the Nationwide Urban Runoff Program (NURP) to document the extent of the urban stormwater problem. The agency began to develop regulations for stormwater permit coverage but encountered resistance from industry and municipalities, and there were additional rounds of litigation. The litigation was pending when Congress considered further amendments to the CWA in 1986.
In the Water Quality Act of 1987, Congress responded to the stormwater problem by defining industrial stormwater dischargers and municipal separate storm sewer systems (often called "MS4") as point sources, and requiring them to obtain NPDES permits, by specific deadlines. The permit exemption for agricultural discharges continued, but Congress created several programs and grants, including a demonstration grant program at the EPA to expand the research and development of non point controls and management practices.
Congress created a major public works financing program for municipal sewage treatment in the 1972 CWA. A system of grants for construction of municipal sewage treatment plants was authorized and funded in Title II. In the initial program, the federal portion of each grant was up to 75 percent of a facility's capital cost, with the remainder financed by the state. In subsequent amendments Congress reduced the federal proportion of the grants and in the 1987 WQA transitioned to a revolving loan program in Title VI. Industrial and other private facilities are required to finance their own treatment improvements on the "polluter pays" principle.
Congress passed the Water Infrastructure Finance and Innovation Act of 2014 (WIFIA) to provide an expanded credit program for water and wastewater infrastructure projects, with broader eligibility criteria than the previously-authorized revolving fund unter CWA Title VI. Pursuant to WIFIA, EPA established its Water Infrastructure and Resiliency Finance Center in 2015 to help local governments and municipal utilities design innovative financing mechanisms, including public–private partnerships. Congress amended the WIFIA program in 2015 and 2016.
This Act has six titles.
Title I includes a Declaration of Goals and Policy and various grant authorizations for research programs and pollution control programs. Some of the programs authorized by the 1972 law are ongoing (e.g. section 104 research programs, section 106 pollution control programs, section 117 Chesapeake Bay Program) while other programs no longer receive funds from Congress and have been discontinued.
To assist municipalities in creating or expanding sewage treatment plants, also known as publicly owned treatment works (POTW), Title II established a system of construction grants. The 1972 CWA provided that federal funds would support 75% of project costs, with state and local funds providing the remaining 25%. In 1981 Congress reduced the federal funding proportion for most grants to 55%.:4 
The construction grant program was replaced by the Clean Water State Revolving Fund in the 1987 WQA (see Title VI), although some local utilities continued to receive "special purpose project grants" directly from Congress, through a budgetary procedure known as "earmarking.":5
Section 301 of the Act prohibits discharges to waters of the U.S. except with a permit. (See Title IV for discussion of permit programs.) Recreational vessels are exempt from the permit requirements, but vessel operators must implement Best Management Practices to control their discharges. (See Regulation of ship pollution in the United States.)
Under the 1972 act EPA began to issue technology-based standards for municipal and industrial sources.
To date, the effluent guidelines and categorical pretreatment standards regulations have been published for 59 categories and apply to approximately 40,000 facilities that discharge directly to the nation's waters, 129,000 facilities that discharge to POTWs, and construction sites. These regulations are responsible for preventing the discharge of almost 700 billion pounds of pollutants each year. EPA has updated some categories since their initial promulgation and has added new categories.
The secondary treatment standards for POTWs and the effluent guidelines are implemented through NPDES permits. (See Title IV.) The categorical pretreatment standards are typically implemented by POTWs through permits that they issue to their industrial users.
The framework that came out of the Clean Water Act to be implemented by the EPA and states includes states monitoring their water bodies and establishing Water Quality Standards for them. Water Quality Standards (WQS) are risk-based requirements which set site-specific allowable pollutant levels for individual water bodies, such as rivers, lakes, streams and wetlands. States set WQS by designating uses for the water body (e.g., recreation, water supply, aquatic life, agriculture) and applying water quality criteria (numeric pollutant concentrations and narrative requirements) to protect the designated uses. An antidegradation policy is also issued by each state to maintain and protect existing uses and high quality waters.
If a state fails to issue WQS, EPA is required to issue standards for that state.
Water bodies that do not meet applicable water quality standards with technology-based controls alone are placed on the section 303(d) list of water bodies not meeting standards. Water bodies on the 303(d) list require development of a Total Maximum Daily Load (TMDL). A TMDL is a calculation of the maximum amount of a pollutant that a water body can receive and still meet WQS. The TMDL is determined after study of the specific properties of the water body and the pollutant sources that contribute to the non-compliant status. Generally, the TMDL determines load based on a Waste Load Allocation (WLA), Load Allocation (LA), and Margin of Safety (MOS) Once the TMDL assessment is completed and the maximum pollutant loading capacity defined, an implementation plan is developed that outlines the measures needed to reduce pollutant loading to the non-compliant water body, and bring it into compliance. Over 60,000 TMDLs are proposed or in development for U.S. waters in the next decade and a half.
Following the issuance of a TMDL for a water body, implementation of the requirements involves modification to NPDES permits for facilities discharging to the water body to meet the WLA allocated to the water body (see Title IV). The development of WQS and TMDL is a complex process, both scientifically and legally, and it is a resource-intensive process for state agencies.
More than half of U.S. stream and river miles continue to violate water quality standards. Surveys of lakes, ponds and reservoirs indicated that about 70 percent were impaired (measured on a surface area basis), and a little more than 70 percent of the nation’s coastlines, and 90 percent of the surveyed ocean and near coastal areas were also impaired.
The primary mode of informing the quality of water of rivers, lakes, streams, ponds, estuaries, coastal waters and wetlands of the U.S. is through the National Water Quality Inventory Report. Water quality assessments are conducted pursuant to water quality standards adopted by states and other jurisdictions (territories, interstate commissions and tribes). The report is conveyed to Congress as a means to inform Congress and the public of compliance with quality standards established by states, territories and tribes. The assessments identify water quality problems within the states and jurisdictions, list the impaired and threatened water bodies, and identify non-point sources that contribute to poor water quality. Every two years states must submit reports that describe water quality conditions to EPA with a complete inquiry of social and economic costs and benefits of achieving goals of the Act. The report is organized into two major sections; Section 1 shows national assessment of each type of water body, with causes and sources identified. Section 2 summarizes recommendations on improvement of water resource management.
Under section 309, EPA can issue administrative orders against violators, and seek civil or criminal penalties when necessary.
States that are authorized by EPA to administer the NPDES program must have authority to enforce permit requirements under their respective state laws.
Military bases, national parks and other federal facilities must comply with CWA provisions.
Section 316 requires standards for thermal pollution discharges, as well as standards for cooling water intake structures (e.g., fish screens). These standards are applicable to power plants and other industrial facilities.
The 1987 amendments created the Nonpoint Source Management Program under CWA section 319. This program provides grants to states, territories and Indian tribes to support demonstration projects, technology transfer, education, training, technical assistance and related activities designed to reduce nonpoint source pollution. Grant funding for the program averaged $210 million annually for Fiscal Years 2004 through 2008.
States are required to certify that discharges authorized by federal permits will not violate the state's water quality standards.
The NPDES permits program is authorized by CWA section 402. The initial permits issued in the 1970s and early 1980s focused on POTWs and industrial wastewater—typically "process" wastewater and cooling water where applicable, and in some cases, industrial stormwater. The 1987 WQA expanded the program to cover stormwater discharges explicitly, both from municipal separate storm sewer systems (MS4) and industrial sources. The MS4 NPDES permits require regulated municipalities to use Best Management Practices to reduce pollutants to the "Maximum Extent Practicable."
POTWs with combined sewers are required to comply with the national Combined Sewer Overflow Control Policy, published by EPA in 1994. The policy requires municipalities to make improvements to reduce or eliminate overflow-related pollution problems. About 860 communities in the US have combined sewer systems, serving about 40 million people.
Non-stormwater permits typically include numeric effluent limitations for specific pollutants. A numeric limitation quantifies the maximum pollutant load or concentration allowed in the discharge, e.g., 30 mg/L of biochemical oxygen demand. Exceeding a numeric limitation constitutes a violation of the permit, and the discharger is subject to fines as laid out in section 309. Facilities must periodically monitor their effluent (i.e., collect and analyze wastewater samples), and submit Discharge Monitoring Reports to the appropriate agency, to demonstrate compliance. Stormwater permits typically require facilities to prepare a Stormwater Pollution Prevention Plan and implement best management practices, but do not specify numeric effluent limits and may not include regular monitoring requirements. Some permits cover both stormwater and non-stormwater discharges. NPDES permits must be reissued every five years. Permit agencies (EPA, states, tribes) must provide notice to the public of pending permits and provide an opportunity for public comment.
In 2012, EPA estimated that there are over 500,000 stormwater permittees. This number includes permanent facilities such as municipal (POTW, MS4) and industrial plants, and construction sites, which are temporary stormwater dischargers.
Section 404 requires that a discharger of dredged or fill material obtain a permit, unless the activity is eligible for an exemption. Essentially, all discharges affecting the bottom elevation of a jurisdictional water body require a permit from the U.S. Army Corps of Engineers (USACE). These permits are an essential part of protecting streams and wetlands, which are often filled by land developers. Wetlands are vital to the ecosystem in filtering streams and rivers and providing habitat for wildlife.
There are two main types of wetlands permits: general permits and individual permits. General permits change periodically and cover broad categories of activities, and require the permittee to comply with all stated conditions. General permits (such as the "Nationwide Permits") are issued for fill activities that will result in minimal adverse effects to the environment. Individual permits are utilized for actions that are not addressed by a general permit, or that do not meet the conditions of a General Permit. In addition, individual permits typically require more analysis than do the general permits, and usually require much more time to prepare the application and to process the permit.
When the USACE processes an application for an Individual Permit, it must issue a public notice describing the proposed action described in the permit application. Although the Corps District Engineer makes the decision to grant a permit, the EPA Administrator may veto a permit if it is not reasonable. Before making such a decision, however, EPA must consult with the USACE. A USACE permit typically expires after five years.
Mountaintop removal mining requires a section 404 permit when soil and rock from the mining operation is placed in streams and wetlands (commonly called a "valley fill"). Pollutant discharges from valley fills to streams also requires an NPDES permit.
After passage of the CWA in 1972, a controversy arose as to the application of section 404 to agriculture and certain other activities. The Act was interpreted by some to place restrictions on virtually all placement of dredged materials in wetlands and other waters of the United States, raising concern that the federal government was about to place all agricultural activities under the jurisdiction of USACE. For opponents of the Act, section 404 had, as a result of this concern, become a symbol of dramatic over-regulation.:901–903 When Congress considered the 1977 CWA Amendments, a significant issue was to ensure that certain agricultural activities and other selected activities, could continue without the government’s supervision—in other words, completely outside the regulatory or permit jurisdiction of any federal agency.
The 1977 amendments included a set of six section 404 exemptions. For example, totally new activities such as construction of farm roads, Sec. 1344(f)(1)(E), construction of farm or stock ponds or irrigation ditches, and minor agricultural drainage, Sec. 1344(f)(1)(A), all are exempted by Statute. Section 1344(f)(1)(C), which exempts discharge of dredged material “for the purpose of... the maintenance of drainage ditches.” All of these exemptions were envisioned to be self-executing, that is not technically requiring an administrative no-jurisdiction determination. One such example was the maintenance of agricultural drainage ditches.:906 Throughout the hearing process, Congressmen of every environmental persuasion repeatedly stated that the over $5 Billion invested in drainage facilities could be maintained without government regulation of any kind.:906–912 Senator Edmund Muskie, for example, explained that exempt activities such as agricultural drainage would be entirely unregulated.:949 Other exemptions were granted as well, including exemptions for normal farming activities.
Although Congress envisioned a set of self-executing exemptions, it has become common for landowners to seek no-jurisdiction determinations from the USACE. A landowner who intends to make substantial investments in acquisition or improvement of land might lawfully proceed with exempt activity, a permit not being required. The problem is that if the landowner's assumptions were incorrect and the activity later determined not to be exempt, the USACE will issue a cease and desist order. Obtaining an advanced ruling provides some level of comfort that the activities will have been deemed conducted in good faith.
Because some of the six exemptions involved new activities, such as minor drainage and silviculture (the clearing of forests by the timber industry), Congress recognized the need to impose some limitations on exemptions. Consequently, Congress placed the so-called recapture clause limitation on these new project exemptions. Under section 404(f)(2), such new projects would be deprived of their exemption if all of the following three characteristics could be shown:
To remove the exemption, all of these requirements must be fulfilled—the discharge, the project purpose of bringing an area into a use to which it was not previously subject, and the impairment or reduction of navigable waters.
The 1987 WQA created a program for management of biosolids (sludge) generated by POTWs. The Act instructed EPA to develop guidelines for usage and disposal of sewage sludge or biosolids. The EPA regulations: (1) Identify uses for sewage sludge, including disposal; (2) Specify factors to be taken into account in determining the measures and practices applicable to each such use or disposal (including publication of information on costs); and (3) Identify concentrations of pollutants which interfere with each such use or disposal. EPA created an Intra-Agency Sludge Task Force to aid in developing comprehensive sludge regulations that are designed to do the following: (1) Conduct a multimedia examination of sewage sludge management, focusing on sewage sludge generated by POTWs; and (2) develop a cohesive Agency policy on sewage sludge management, designed to guide the Agency in implementing sewage sludge regulatory and management programs.
The term biosolids is used to differentiate treated sewage sludge that can be beneficially recycled. Environmental advantages of sewage sludge consist of, application of sludge to land due to its soil condition properties and nutrient content. Advantages also extend to reduction in adverse health effects of incineration, decreased chemical fertilizer dependency, diminishing greenhouse gas emissions deriving from incineration and reduction in incineration fuel and energy costs. Beneficial reuse of sewage sludge is supported in EPA policies: the 1984 Beneficial Reuse Policy and the 1991 Inter-agency Policy on Beneficial Use of Sewage Sludge, with an objective to reduce volumes of waste generated. Sewage sludge contains nutrients such as nitrogen and phosphorus but also contains significant numbers of pathogens such as bacteria, viruses, protozoa and eggs of parasitic worms. Sludge also contains more than trace amounts of organic and inorganic chemicals. Benefits of reusing sewage sludge from use of organic and nutrient content in biosolids is valuable source in improving marginal lands and serving as supplements to fertilizers and soil conditioners. Extension of benefits of sludge on agriculture commodities include increase forest productivity, accelerated tree growth, re-vegetation of forest land previously devastated by natural disasters or construction activities. Also, sewage sludge use to aid growth of final vegetative cap for municipal solid waste landfills is enormously beneficial. Opposing benefits of sludge water result from high levels of pathogenic organisms that can possibly contaminate soil, water, crops, livestock, and fish. Pathogens, metals, organic chemical content and odors are cause of major health, environmental and aesthetic factors. Sludge treatment processes reduce the level of pathogens which becomes important when applying sludge to land as well as distributing and marketing it. Pollutants of sewage sludge come from domestic wastewater, discharge of industrial wastewater, municipal sewers and also from runoffs from parking lots, lawns and fields that were applied fertilizers, pesticides and insecticides.
The quality of sewage sludge is controlled under section 405(d), where limitations are set with methods of use or disposal for pollutants in sludge. EPA, under section 405(d)(3), established a containment approach to limit pollutants instead of numerical limitations. This methodology is more reasonable than numerical limitations and includes design standards, equipment standards, management practice, and operational standards or combination of these. Limits on sewage sludge quality allows treatment works that generate less contaminated pollutants and those that do not meet the sludge quality standards for use and disposal practice must clean up influent, improve sewage sludge treatment and/or select another use of disposal method. EPA has set standards for appropriate practices of use and disposal of biosolids in order to protect public health and the environment, but choice of use or disposal practices are reserved to local communities. Listed under section 405(e) of CWA, local communities are encouraged to use their sewage sludge for its beneficial properties instead of disposing it.
Standards are set for sewage sludge generated or treated by publicly owned and privately owned treatment works that treat domestic sewage and municipal wastewater. Materials flushed in household drains through sinks, toilets and tubs are referred to as domestic wastewater and include components of soaps, shampoos, human excrement, tissues, food particles, pesticides, hazardous waste, oil and grease. These domestic wastewaters are treated at the source in septic tanks, cesspools, portable toilets, or in publicly/privately owned wastewater treatment works. Alternately, municipal wastewater treatments consist of more levels of treatment that provide greater wastewater cleanup with larger amounts of sewage sludge. Primary municipal treatment remove solids that settle at the bottom, generating more than 3,000 liters of sludge per million liters of wastewater that is treated. Primary sludge water content is easily reduced by thickening or removing water and contains up to 7% solids. Secondary municipal treatment process produces sewage sludge that is generated by biological treatment processes that include activated sludge systems, trickling filters, and other attached growth systems. Microbes are used to break down and convert organic substances in wastewater to microbial residue in biological treatment processes. This process removes up to 90% of organic matter and produces sludge that contains up to 2% solids and has increased generated volumes of sludge. Methods of use and disposal of sewage sludge include the following: Application of sludge to agricultural and non-agricultural lands; sale or give-away of sludge for use in home gardens; disposal of sludge in municipal landfills, sludge-only landfills, surface disposal sites and incineration of sludge. Managing quality of sewage sludge not only involves wastewater reduction and separation of contaminated waste from non-contaminants but also pretreatment of non-domestic wastewater. Pretreatment does not thoroughly reduce pollutants level and therefore communities have to dispose rather than use sludge.
Any U.S. citizen may file a citizen suit against any person who has allegedly violated an effluent limitation regulation or against the EPA Administrator if the EPA Administrator failed to perform any non-discretionary act or duty required by the CWA.
The CWA includes an employee ("whistleblower") protection provision. Employees in the U.S. who believe they were fired or suffered adverse action related to enforcement of the CWA may file a written complaint with the Occupational Safety and Health Administration.
The Clean Water State Revolving Fund (CWSRF) program was authorized by the 1987 WQA. This replaced the municipal construction grants program, which was authorized in the 1972 law under Title II. In the CWSRF, federal funds are provided to the states and Puerto Rico to capitalize their respective revolving funds, which are used to provide financial assistance (loans or grants) to local governments for wastewater treatment, nonpoint source pollution control and estuary protection.
The fund provides loans to municipalities at lower-than-market rates. The average interest rate was 1.4 percent nationwide in 2017, compared to an average market rate of 3.5 percent. In 2017, CWSRF assistance totaling $7.4 billion was provided to 1,484 local projects across the country.
During the 1880s and 1890s, Congress directed USACE to prevent dumping and filling in the nation's harbors, and the program was vigorously enforced. Congress first addressed water pollution issues in the Rivers and Harbors Act of 1899, giving the Corps the authority to regulate most kinds of obstructions to navigation, including hazards resulting from effluents. Portions of this law remain in effect, including Section 13, the so-called Refuse Act. In 1910, USACE used the act to object to a proposed sewer in New York City, but a court ruled that pollution control was a matter left to the states alone. Speaking to the 1911 National Rivers and Harbors Congress, the chief of the Corps, Brigadier General William H. Bixby, suggested that modern treatment facilities and prohibitions on dumping "should either be made compulsory or at least encouraged everywhere in the United States."
Some sections of the 1899 act have been superseded by various amendments, including the 1972 CWA, while other notable legislative predecessors include:
When EPA first opened its doors in 1970, the agency had weak authority to protect U.S. waters, lacking the legal power to write effluent guidelines and possessing only general authority to require secondary treatment from industrial dischargers.
Executive Order 12898 (1994) states “... each Federal agency shall make achieving environmental justice part of its mission by identifying and addressing, as appropriate, disproportionately high and adverse human health or environmental effects of its programs, policies, and activities on minority, low-income, and indigenous populations.” The order is also intended to advocate nondiscrimination in federal programs that influence the environment and public health, and aims to provide low-income, minority, and indigenous communities access to public information and participation.
In May 2015 EPA released a new rule on the definition of "waters of the United States" ("WOTUS") and the future enforcement of the act. Thirteen states sued, and on August 27 U.S. Chief District Judge for North Dakota Ralph R. Erickson issued a preliminary injunction blocking the regulation in those states. In a separate lawsuit, on October 9 a divided Sixth Circuit appeals court stayed the rule’s application nationwide. Congress then passed a joint resolution under the Congressional Review Act overturning the WOTUS rule, but President Barack Obama vetoed the measure.
On February 28, 2017, President Donald Trump signed documents directing EPA and the Army Corps of Engineers to review and rewrite the Obama administration's "Clean Water Rule," which would clarify the WOTUS definition. The agencies were ordered to reassess the rule consistent with promoting economic growth and minimizing regulatory uncertainty.
The Sixth Circuit appeals court stay was overturned on January 22, 2018 when the Supreme Court ruled unanimously that challenges to the 2015 rule must be filed in United States district courts. EPA then formally suspended the 2015 regulation and announced plans to issue a new version later in 2018.
To date, the water quality goals stated by Congress in the 1972 act have not been achieved by American society:
More than half of U.S. stream and river miles, about 70 percent of lakes, ponds and reservoirs, and 90 percent of the surveyed ocean and near coastal areas continue to violate water quality standards. The reasons for the impairment vary by location; major sources are agriculture, industry and communities (typically through urban runoff). Some of these pollution sources are difficult to control through national regulatory programs.
However, since the passage of the 1972 act, the levels of pollution in the United States have experienced a dramatic decrease. The law has resulted in much cleaner waterways than before the bill was passed. Agriculture, industry, communities and other sources continue to discharge waste into surface waters nationwide, and many of these waters are drinking water sources. In many watersheds nutrient pollution (excess nitrogen and phosphorus) has become a major problem. It is argued in a 2008 paper that the Clean Water Act has made extremely positive contributions to the environment, but is in desperate need of reform to address the pollution problems that remain.
A 2017 economic study finds that "most types of water pollution declined [over the period 1962-2001], though the rate of decrease slowed over time... Our finding of decreases in most pollutants implies that the prevalence of such violations was even greater before the Clean Water Act." Several studies have estimated that the costs of the CWA (including the expenditures for the Title II construction grants program) are higher than the benefits. An EPA study had similar findings, but acknowledged that several kinds of benefits were unmeasured.:2 (See Cost–benefit analysis.)
Anadarko Petroleum Corporation is an American petroleum and natural gas exploration and production company headquartered in two skyscrapers in The Woodlands, Texas: the Allison Tower and the Hackett Tower, both named after former CEOs of the company.
The company has been the subject of multiple environmental cases, including the largest environmental contamination settlement in American history - the 2014 settlement related to the former Tronox subsidiary of Kerr McGee, a company purchased by Anadarko in 2006.The company is ranked 257th on the Fortune 500.Best available technology
The best available technology or best available techniques (BAT) is the technology approved by legislators or regulators for meeting output standards for a particular process, such as pollution abatement or pasteurization. Similar terms are best practicable means or best practicable environmental option. BAT is a moving target on practices, since developing societal values and advancing techniques may change what is currently regarded as "reasonably achievable", "best practicable" and "best available".
A literal understanding will connect it with a "spare no expense" doctrine which prescribes the acquisition of the best state of the art technology available, without regard for traditional cost-benefit analysis. In practical use, the cost aspect is also taken into account. See also discussions on the topic of the precautionary principle which, along with considerations of best available technologies and cost-benefit analyses, is also involved in discussions leading to formulation of environmental policies and regulations (or opposition to same).Best management practice for water pollution
Best management practices (BMPs) is a term used in the United States and Canada to describe a type of water pollution control. Historically the term has referred to auxiliary pollution controls in the fields of industrial wastewater control and municipal sewage control, while in stormwater management (both urban and rural) and wetland management, BMPs may refer to a principal control or treatment technique as well.Buzzards Bay
Buzzards Bay is a bay of the Atlantic Ocean adjacent to the U.S. state of Massachusetts. It is approximately 28 miles (45 kilometers) long by 8 miles (12 kilometers) wide. It is a popular destination for fishing, boating, and tourism. Since 1914, Buzzards Bay has been connected to Cape Cod Bay by the Cape Cod Canal. In 1988, under the Clean Water Act, the Environmental Protection Agency and the State of Massachusetts designated Buzzards Bay to the National Estuary Program, as "an estuary of national significance" that is threatened by pollution, land development, or overuse.Clean Water Act (Ontario)
The Clean Water Act (S.O. 2006, Chapter 22) is a law enacted by the Legislative Assembly of Ontario, Canada. The purpose of this Act is to protect existing and future sources of drinking water.
The Clean Water Act, 2006 (Bill 43) is a major part of the Ontario government's commitment to ensuring that every Ontarian has access to safe drinking water. Protecting water at its source is the first step in the multi-barrier approach to source water protection. By stopping contaminants from getting into sources of drinking water — lakes, rivers and aquifers — we can provide the first line of defence in the protection of our environment and the health of Ontarians.
For the first time, communities will be required to create and carry out a plan to protect the sources of their municipal drinking water supplies. The Clean Water Act, 2006 will:
Require local communities to look at the existing and potential threats to their water and set out and implement the actions necessary to reduce or eliminate significant threats.
Empower communities to take action to prevent threats from becoming significant.
Require public participation on every local source protection plan. This means everyone in the community gets a chance to contribute to the planning process.
Require that all plans and actions are based on sound science.This legislation sets out a basic framework for the establishment of community-based groups that represent a cross-section of sectors and geographic areas within Conservation Authority (Canada) boundaries. These community-based groups are called Source Protection Committees and there are 19 such groups across Ontario.
The Clean Water Act, 2006 also introduced the Ontario Drinking Water Stewardship Program (ODWSP) a financial assistance program for farmers, landowners and small or medium businesses for activities that reduce threats to municipal drinking water sources.Clean Water Rule
The Clean Water Rule is a 2015 regulation published by the U.S. Environmental Protection Agency (EPA) and the United States Army Corps of Engineers (USACE) to clarify water resource management in the United States under a provision of the Clean Water Act of 1972. The regulation defined the scope of federal water protection in a more consistent manner, particularly over streams and wetlands which have a significant hydrological and ecological connection to traditional navigable waters, interstate waters, and territorial seas. It is also referred to as the Waters of the United States rule, which defines all bodies of water that fall under U.S. federal jurisdiction. The rule was published in response to concerns about lack of clarity over its scope from legislators at multiple levels, industry members, researchers and other science professionals, activists, and citizens.The rule has been contested in litigation. In 2017 the Trump administration announced its intent to review and rescind or revise the rule. Following a Supreme Court ruling on January 22, 2018 that lifted a nationwide stay on the rule, the Trump administration formally suspended the rule until February 6, 2020, thereby giving EPA administrator Scott Pruitt more time to issue a draft proposal of replacement water regulations with looser regulatory requirements.Deepwater Horizon litigation
The civil and criminal proceedings stemming from the explosion of Deepwater Horizon and the resulting massive oil spill in the Gulf of Mexico began shortly after the April 20, 2010 incident and have continued since then. They have included an extensive claims settlement process for a guilty plea to criminal charges by BP, and an ongoing Clean Water Act lawsuit brought by the U.S. Department of Justice and other parties.
A federal judge, ruling on the Clean Water Act suit in September 2014, found that BP was primarily responsible for the oil spill as a result of its deliberate misconduct and gross negligence. The finding means that the company may be subject to $18 billion in penalties in addition to the $28 billion already paid out in claims and cleanup costs. Such penalties are far larger than the $3.5 billion BP had allotted to the case, and could have grave implications for the company.Effluent guidelines
Effluent Guidelines (also referred to as Effluent Limitation Guidelines (ELGs)) are U.S. national standards for wastewater discharges to surface waters and publicly owned treatment works (POTW) (also called municipal sewage treatment plants). The United States Environmental Protection Agency (EPA) issues Effluent Guideline regulations for categories of industrial sources of water pollution under Title III of the Clean Water Act (CWA). The standards are technology-based, i.e. they are based on the performance of treatment and control technologies (e.g., Best Available Technology). Effluent Guidelines are not based on risk or impacts of pollutants upon receiving waters.Regulated pollutants range from acenaphthene to zinc, with maximum allowed contamination levels in discharge water (wastewater) varying by industry. The regulations cover pollutants for which there are approved analytical testing methods. EPA has published many methods in its regulations, and has approved the use of other methods published by peer-reviewed sources, such as Standard Methods. In the early years of the program (1970s-1980s) the agency published methods for a list of 126 "priority pollutants," consisting of various toxic pollutants. Subsequently the agency has issued methods and regulated pollutants beyond those in the initial priority list.Since the mid-1970s, the EPA has promulgated ELGs for 59 industrial categories, with over 450 subcategories. Effluent Guidelines currently control pollution at approximately 40,000 facilities that discharge directly to the nation's waters, 129,000 facilities that discharge to POTWs, and construction sites. The regulations annually prohibit the discharge of 700 billion pounds of pollutants into U.S. surface waters. EPA periodically reviews the existing industrial regulations and occasionally updates an existing category or adds a new category.Effluent Guidelines are implemented in water discharge permits issued to facilities through the National Pollutant Discharge Elimination System (NPDES).National Ass'n of Home Builders v. Defenders of Wildlife
National Assn. of Home Builders v. Defenders of Wildlife, 551 U.S. 644 (2007), was a United States Supreme Court case about federal jurisdiction over anti-pollution statutes. Justice Samuel Alito wrote the opinion of the Court, holding that the Endangered Species Act did not require the Environmental Protection Agency to apply additional criteria when evaluating a transfer of pollution control jurisdiction under the Clean Water Act. Justices John Paul Stevens and Stephen Breyer wrote dissenting opinions.New Source Performance Standard
New Source Performance Standards (NSPS) are pollution control standards issued by the United States Environmental Protection Agency (EPA). The term is used in the Clean Air Act Extension of 1970 (CAA) to refer to air pollution emission standards, and in the Clean Water Act (CWA) referring to standards for water pollution discharges of industrial wastewater to surface waters.Point source pollution
A point source of pollution is a single identifiable source of air, water, thermal, noise or light pollution. A point source has negligible extent, distinguishing it from other pollution source geometries (such as nonpoint source or area source). The sources are called point sources because in mathematical modeling, they can be approximated as a mathematical point to simplify analysis. Pollution point sources are identical to other physics, engineering, optics, and chemistry point sources and include:
Air pollution from an industrial source (rather than an airport or a road, considered a line source, or a forest fire, which is considered an area source, or volume source)
Water pollution from factories, power plants, municipal sewage treatment plants and some farms (see concentrated animal feeding operation). The U.S. Clean Water Act also defines municipal separate storm sewer systems and industrial stormwater discharges (such as construction sites) as point sources.
Noise pollution from a jet engine
Disruptive seismic vibration from a localized seismic study
Light pollution from an intrusive street light
Radio emissions from an interference-producing electrical devicePollutant
A pollutant is a substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource. A pollutant may cause long- or short-term damage by changing the growth rate of plant or animal species, or by interfering with human amenities, comfort, health, or property values. Some pollutants are biodegradable and therefore will not persist in the environment in the long term. However, the degradation products of some pollutants are themselves polluting such as the products DDE and DDD produced from degradation of DDT.Rapanos v. United States
Rapanos v. United States, 547 U.S. 715 (2006), was a United States Supreme Court case challenging federal jurisdiction to regulate isolated wetlands under the Clean Water Act. It was the first major environmental case heard by the newly appointed Chief Justice, John Roberts and Associate Justice, Samuel Alito. The Supreme Court heard the case on February 21, 2006 and issued a decision on June 19, 2006.
While five justices agreed to void rulings against the defendants, who were prosecuted for impacting a wetland incidental to commercial development, the court was split over further details, with the four more conservative justices arguing in a plurality opinion for a more restrictive reading of the term "navigable waters" than the four more liberal justices. Justice Anthony Kennedy did not fully join either position. The case was remanded to the lower court.
Ultimately, Rapanos agreed to a nearly $1,000,000 settlement with the EPA without admitting to any wrongdoing.Return flow
Return flow is surface and subsurface water that leaves the field following application of irrigation water. While irrigation return flows are point sources, in the United States they are expressly exempted from discharge permit requirements under the Clean Water Act.Return flows generally return to the irrigation centre after a period of about three to four weeks; due to this, the farmers usually need to pour bleach into the water to clean it of any organisms that have entered the stream. If this is not taken care of, diseases such as typhoid or cholera could enter the irrigation and pose a risk of epidemic disease to surrounding towns and cities.Sackett v. Environmental Protection Agency
Sackett v. United States Environmental Protection Agency, 566 U.S. 120 (2012), is a United States Supreme Court case in which the Court held that orders issued by the Environmental Protection Agency under the Clean Water Act are subject to the Administrative Procedure Act. The Court ruled that because the Environmental Protection Agency's orders constitute "final agency action" under the Administrative Procedure Act, federal courts may hear appeals from its orders.San Francisco Estuary Partnership
The San Francisco Estuary Partnership (Partnership) is one of the 28 National Estuary Programs created in the 1987 Amendments to the Clean Water Act. The Partnership is a non-regulatory federal-state-local collaboration working to restore water quality and manage the natural resources of the San Francisco Bay-Sacramento–San Joaquin River Delta estuary. The Partnership works with over 100 municipalities, non-profits, governmental agencies, and businesses and helps develop, find funding for, and implement over 40 projects and programs aimed at improving the health of the estuary. The partnership either directly implements these projects, or administers and manages grants, holds educational workshops and highlights project results. The Partnership is also the official representative for the San Francisco Bay region to the Most Beautiful Bays in the World.
The Partnership's office is colocated with the San Francisco Regional Water Quality Control Board in the Elihu M Harris State Building.Shawsheen River
The Shawsheen River is a 26.7-mile-long (43.0 km) tributary of the Merrimack River in northeast Massachusetts. The name has had various spellings. According to Bailey's history of Andover, the spelling Shawshin was the most common in the old records, although Shawshine, Shashin, Shashine, Shashene, Shawshene, and later, Shawsheen, are found. The name, says Bailey, is said to mean "Great Spring".The river runs generally northward through the towns of Bedford, Billerica, Wilmington, Tewksbury, Andover, and Lawrence, where it joins the Merrimack. Like its parent, the river has played an important role in the development of the area, including industrial development, with many mills built to take advantage of the river's power. Today there are trails and parks located along several sections of the river, and a preservation effort is carried out by the Shawsheen River Watershed Association.
In June 2001, the Merrimack River Watershed Council determined that the Shawsheen River failed to meet water quality standards. This situation was largely attributed to stormwater runoff via town, private and state storm drain systems. As a result of increased pollutants, major portions of the Shawsheen River are now listed as impaired waters on the 303(d) list of the Clean Water Act.The removal of the Marland Place Dam (originally built in the 1700s) and Balmoral Dam (originally built in the 1920s) allowed alewife and blueback herring to spawn upstream to the Ballardvale Dam in spring 2017, for the first time in over 200 years.Total maximum daily load
A Total Maximum Daily Load (TMDL) is a regulatory term in the U.S. Clean Water Act, describing a plan for restoring impaired waters that identifies the maximum amount of a pollutant that a body of water can receive while still meeting water quality standards.Total suspended solids
Total suspended solids (TSS) is the dry-weight of suspended particles, that are not dissolved, in a sample of water that can be trapped by a filter that is analyzed using a filtration apparatus. It is a water quality parameter used to assess the quality of a specimen of any type of water or water body, ocean water for example, or wastewater after treatment in a wastewater treatment plant. It is listed as a conventional pollutant in the U.S. Clean Water Act. Total dissolved solids is another parameter acquired through a separate analysis which is also used to determine water quality based on the total substances that are fully dissolved within the water, rather than undissolved suspended particles.
TSS was previously called non-filterable residue (NFR), but was changed to TSS because of ambiguity in other scientific disciplines.