Kiera Jefferson
Water pollution is a pressing issue, with our rivers, reservoirs, lakes, and seas being inundated with chemicals, waste, plastics, and other pollutants. While federal and state laws regulate water quality, there is no single national criterion for water pollution in the United States. This is due to a variety of factors, including the difficulty in regulating nonpoint source pollution, which is the leading cause of water pollution in the country, and the fact that water pollution cannot be contained by geographical boundaries. Additionally, the Clean Water Act (CWA), implemented in 1972, has not achieved its stated goal of making all U.S. waters fishable and swimmable by 1983, with a significant portion of the country's water bodies still violating water quality standards. The act has also been the subject of controversy, with debates surrounding its efficacy and the actual reduction in water pollution.
| Characteristics | Values |
|---|---|
| Water quality standards are expensive to develop, implement, and enforce | The standards are expensive for state agencies, local governments, businesses, and taxpayers |
| Water quality standards protect state waters for various uses | Drinking water, swimming, fishing, irrigation, and more |
| Numeric standards are allowable concentrations of specific chemicals | When present in a water body, they will protect designated beneficial uses |
| Numeric standards are derived using methods provided in Minnesota rules | They are specific to each beneficial use |
| Narrative standards are not available for all pollutants and water quality concerns | Minnesota rules provide for the development of site-specific criteria to address these cases |
| Antidegradation protections help maintain high-quality waters | They were established to provide future generations with the opportunity to enjoy high-quality and highly valued recreational and aesthetic resources |
| Nonpoint source pollution is the leading cause of water pollution in U.S. waters | It's difficult to regulate because there's no single, identifiable culprit |
| Transboundary pollution is the result of contaminated water from one country spilling into the waters of another | It can result from a disaster or the slow, downriver creep of industrial, agricultural, or municipal discharge |
| The 1899 law did not address environmental impacts from pollution | It did not address sewage or industrial discharges |
| The Clean Water Act has been one of the most controversial regulations in U.S. history | It is uncertain whether the Act has been efficacious or if there has been any discernible reduction in water pollution |
| The Clean Water Act made it unlawful to discharge any pollutant from a point source into navigable waters | The EPA's National Pollutant Discharge Elimination System (NPDES) permit program controls discharges |
| The EPA has developed national water quality criteria recommendations for pollutants in surface waters | The criteria are based on the latest scientific knowledge on the effects that pollutant concentrations have on aquatic species, recreation, and/or human health |
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What You'll Learn
The Clean Water Act (CWA)
The CWA was enacted in 1948 as the Federal Water Pollution Control Act and was significantly reorganized and expanded in 1972. The 1969 burning Cuyahoga River sparked national outrage, and the Act grew out of it. In December 1970, a federal grand jury investigation was led by US Attorney Robert Jones of Ohio, regarding water pollution allegedly caused by about 12 companies in northeastern Ohio. It was the first grand jury investigation of water pollution in the area. The Clean Water Act has been one of the most controversial regulations in the history of the United States.
The CWA establishes the basic structure for regulating discharges of pollutants into the waters of the United States and regulating quality standards for surface waters. Under the CWA, the Environmental Protection Agency (EPA) has implemented pollution control programs such as setting wastewater standards for industry. The EPA has also developed national water quality criteria recommendations for pollutants in surface waters. The CWA made it unlawful to discharge any pollutant from a point source into navigable waters unless a permit was obtained. The EPA's National Pollutant Discharge Elimination System (NPDES) permit program controls these discharges.
The CWA does not specifically address contamination of groundwater resources, a subject addressed by provisions in other laws, including the Safe Drinking Water Act and the Resource Conservation and Recovery Act. The CWA can be found at 33 U.S.C. § 1251 et seq. The CWA regulations are in 40 C.F.R. Parts 104-108, 110-117, 122-140, 230-233, 401-471, and 501-503.
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Sewage treatment systems
Decentralized systems are often used in developing countries, rural areas, and small to medium-sized communities. They include on-site sanitation systems such as septic tanks connected to drain fields, on-site sewage systems (OSS), vermicomposting systems, and waste stabilization ponds. Septic tanks, a common component of individual home sewage treatment systems, have been used for on-site wastewater treatment for over a century. These tanks can have single or multiple compartments, and they facilitate the separation of solids from liquids in the sewage. The house plumbing system, which includes waste pipes, vent pipes, and water traps, is connected to the septic tank through a sewer line. The septic tank outlet sewer pipe then leads to the final soil treatment unit, which can be a soil absorption unit or a lagoon.
Centralized systems, on the other hand, are typically found in urban areas and involve the use of a combined sewer system or sanitary sewers. In a combined sewer system, sewage (municipal wastewater) is carried together with stormwater to the sewage treatment plant. Sanitary sewers, on the other hand, carry sewage separately, while runoff from streets is conveyed through storm drains. Centralized systems often involve large-scale, advanced, and relatively expensive sewage treatment plants that may include tertiary treatment with disinfection and, in some cases, a fourth treatment stage to remove micropollutants.
The choice of sewage treatment technology depends on various factors, including desired effluent quality, construction and operating costs, land availability, energy requirements, and sustainability. While high-tech options offer more advanced treatment processes, they come with higher costs. In contrast, low-tech systems are often less expensive, but they may only treat part of the sewage or provide pre-treatment, such as septic tanks.
It is important to note that sewage treatment systems play a vital role in preventing water pollution. By effectively treating sewage and wastewater, these systems help remove contaminants, producing an effluent that is safe for discharge into the surrounding environment or suitable for reuse applications.
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Water quality standards
One key aspect of water quality standards is the numeric criteria, which specify the allowable concentrations of specific chemicals in a water body to protect designated beneficial uses. These numeric standards are derived using methods provided by state rules and are specific to each beneficial use. For example, the numeric standard for protecting aquatic life and recreation may differ from the standard for agricultural uses and wildlife. When numeric standards exist for multiple beneficial use classes, the most stringent value is applied.
In addition to numeric standards, there are also narrative standards that prohibit unacceptable conditions in a water body. These narrative standards are typically used when numeric standards are not available for certain pollutants or water quality concerns. Site-specific criteria are then developed to address these unique situations. Antidegradation is another critical element of water quality standards, aiming to maintain high-quality waters and prevent their deterioration. This is particularly important for future generations to enjoy highly valued recreational and aesthetic resources.
While the Clean Water Act (CWA) has set ambitious goals for water quality, it has faced controversies and challenges. The EPA has implemented pollution control programs and developed national water quality criteria recommendations under the CWA. However, studies suggest that the costs of the CWA may outweigh its benefits, and the effectiveness of the Act in reducing water pollution remains uncertain. Nonetheless, water quality standards remain a critical tool in our efforts to protect and restore our valuable water resources.
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Nonpoint source pollution
To prevent nonpoint source pollution, individuals can keep litter, pet waste, leaves, and debris out of street gutters and storm drains. They can also apply lawn and garden chemicals sparingly and dispose of used oil, antifreeze, paints, and other household chemicals properly. Local governments can establish programs for collecting household hazardous wastes. Additionally, low-impact development can help reduce urban runoff and improve water quality.
While the Clean Water Act and Clean Air Act have helped limit both point-source and nonpoint-source pollution, making America's air and water cleaner than they were for most of the 20th century, the water quality goals stated by Congress in the 1972 Act have not yet been achieved. More than half of U.S. stream and river miles, about 70% of lakes, ponds, and reservoirs, and 90% of surveyed ocean and near-coastal areas still violate water quality standards.
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Water quality goals
Water quality standards are essential for protecting water bodies and ensuring their safe use for drinking, swimming, fishing, and other purposes. These standards specify the allowable concentrations of specific chemicals and pollutants, such as nitrogen, phosphorus, and heavy metals, that can be present in a water body while still protecting its designated beneficial uses. Developing and enforcing these standards can be expensive, but the benefits of maintaining high water quality are significant.
In the United States, the Clean Water Act (CWA) of 1972 set ambitious water quality goals, aiming to make all U.S. waters fishable and swimmable by 1983. Despite this, decades later, a significant portion of the country's water bodies remain polluted and unfit for intended uses. Nonpoint source pollution, including agricultural and stormwater runoff, is a leading cause of water pollution and is challenging to regulate due to its diffuse nature.
To address water pollution, the Environmental Protection Agency (EPA) has developed national water quality criteria and recommendations. These criteria provide models for nutrient pollution, particularly total nitrogen and total phosphorus concentrations, to protect aquatic life, recreation, and drinking water sources. The EPA also established the National Pollutant Discharge Elimination System (NPDES) permit program to control discharges from point sources, such as pipes or ditches, into navigable waters.
While the EPA sets national guidelines, states and federally recognized Indigenous Nations have the flexibility to modify the criteria to reflect site-specific conditions. They can incorporate local data into the national models to derive numeric nutrient criteria that account for unique local conditions while also aligning with national, large-scale trends. This adaptability ensures that water quality standards are tailored to the specific needs and characteristics of each region.
Additionally, states have the responsibility to protect their designated areas by adopting water quality criteria published by the EPA under the CWA. They are required to revise these standards based on designated uses, and bodies of water must be periodically re-examined to incorporate new information that may demand further revisions. These dynamic approaches ensure that water quality goals remain responsive to changing conditions and emerging scientific knowledge.
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Frequently asked questions
There are national criteria for water pollution, but they are non-binding recommendations. The Environmental Protection Agency (EPA) has developed national water quality criteria recommendations for pollutants in surface waters. These criteria are based on scientific knowledge and are designed to protect aquatic life, human health, and recreational uses of water bodies. However, states and tribes have the flexibility to modify these criteria to reflect site-specific conditions and local data.
Water pollution has various sources, including agricultural runoff, industrial discharges, municipal waste, and stormwater runoff. Nonpoint source pollution, where there is no single identifiable culprit, is the leading cause of water pollution in the US. Consumers also contribute to water pollution, with cars and trucks being a major source of oil pollution in marine environments.
Water pollution has several negative impacts. It degrades water quality, making it unfit for swimming, fishing, and drinking. It also poses risks to human health and harms aquatic ecosystems and species. Additionally, water pollution can have economic impacts, affecting property values, tourism, and industries such as fishing and recreation.
Water quality standards protect our water resources and ensure they are safe for various uses, including drinking water, swimming, and irrigation. These standards help maintain high water quality, preserve ecosystems, and protect human health. They also help avoid future costs associated with restoring impaired water systems, as prevention is generally more cost-effective than remediation.
Addressing water pollution requires a combination of regulatory measures, improved wastewater treatment facilities, and individual actions. The Clean Water Act, for example, regulates pollutant discharges and sets wastewater standards for industries. Upgrading sewage treatment systems can also help reduce the amount of untreated wastewater released into waterways. Individuals can contribute by properly disposing of waste, reducing the use of single-use plastics, and minimizing the use of harmful chemicals.
