Meghan Hodges
The Priority Pollutant List is a list of chemical pollutants that are regulated by the Environmental Protection Agency (EPA). The list was developed in 1977 as a derivative of the Toxic Pollutant List, which was created in 1976 and added to the Clean Water Act by Congress in 1977. The Priority Pollutant List includes specific chemical names and is used for water testing and regulatory purposes. It is more practical for testing and regulation than the Toxic Pollutant List, which contains broad categories of pollutants. The EPA used four main criteria to prioritize specific pollutants for the list, including the frequency of occurrence in water and the quantity produced. There are 126 chemicals on the list, which can be divided into three separate categories, and 13 of them are metals.
| Characteristics | Values |
|---|---|
| Developed by | Environmental Protection Agency (EPA) |
| Year | 1977 |
| Purpose | To make the Toxic Pollutant List more practical for water testing and regulatory purposes |
| Number of entries | 126 |
| Criteria for prioritization | Four main criteria: presence on the Toxic Pollutants List, availability of a chemical standard for testing, frequency of occurrence in water, and quantity produced |
Explore related products
$149.57 $219.99
What You'll Learn
The Clean Water Act
The EPA has also developed national water quality criteria recommendations for pollutants in surface waters, and set wastewater standards for industry. The EPA's Office of Water (OW) ensures drinking water is safe and restores and maintains oceans, watersheds, and aquatic ecosystems to protect human health, support economic and recreational activities, and provide healthy habitats for fish, plants, and wildlife.
Beat Pollution Inversion: Breathe Easy Above the Smog
You may want to see also
Explore related products
Toxic Pollutant List
In 1972, the Clean Water Act was passed to prohibit the unlawful disposal of toxic pollutants in US waters. The Environmental Protection Agency (EPA) outlined lists of toxic pollutants that could harm the environment and, therefore, require federal regulation during disposal. The Toxic Pollutant List was developed in 1976 and includes 65 entries of groupings of pollutants deemed toxic. The list acts as a starting point for the EPA in regulating the disposal of these pollutants.
The Priority Pollutant List was created in 1977 to make the implementation of the Toxic Pollutant List more practical for water testing and regulatory purposes. The list is more practical for testing and regulation as it lists chemicals by their individual names, as opposed to the Toxic Pollutant List, which contains open-ended groups of pollutants, such as "chlorinated benzenes". The Priority Pollutant List includes 126 chemicals that can be divided into three categories.
To determine which pollutants are considered a priority, the EPA used four main criteria:
- The pollutant is specifically named on the list of toxic pollutants
- A chemical standard is available to allow testing
- The pollutant was reported as found in water with an occurred frequency of at least 2.5%
- The pollutant was produced in large quantities
The 13 priority pollutant metals are of utmost importance to the industrial manufacturing industry, as they are frequently found in wastewater. It is crucial for this industry to ensure proper testing for potential health risks and toxic exposures to protect human health and the environment.
How Metal Pollution is Killing Coral Reefs
You may want to see also
Explore related products
Testing and regulation
The EPA Priority Pollutant List was developed in 1977 to make the implementation of the Toxic Pollutant List, created in 1976, more practical for water testing and regulatory purposes. The Toxic Pollutant List was intended to be used by the EPA and states as a starting point to ensure that Effluent Guidelines regulations, water quality criteria and standards, and NPDES permit requirements addressed the problems of toxics in waterways. However, this list consisted of broad categories of pollutants rather than specific, individual pollutants.
The Priority Pollutants are a set of chemical pollutants that the EPA regulates and for which the EPA has published analytical test methods. The Priority Pollutant List makes the list of toxic pollutants more usable and practical for testing and regulation by listing chemicals by their individual chemical names. In contrast, the list of toxic pollutants contains open-ended groups of pollutants, such as "chlorinated benzenes," which contain hundreds of compounds for which there is no test for the group as a whole, nor is it practical to regulate or test for all compounds.
In determining which pollutants are considered priority, the EPA used four main criteria to prioritize specific pollutants:
- The pollutant must be specifically named on the list of toxic pollutants.
- There must be a chemical standard available to allow testing for the pollutant.
- The pollutant must be reported as found in water with an occurrence frequency of at least 2.5%.
- The pollutant must be produced in significant quantities, as reported in Stanford Research Institute's "1976 Directory of Chemical Producers, USA."
The Priority Pollutant List was included to support regulations for the Steam Electric Power Generating Category (40 CFR Part 423), one of the first industrial categories for which the EPA developed Effluent Guidelines. However, the Priority Pollutant List in Appendix A is not limited in relevance to just this industrial category.
Some methods for detecting priority pollutants include the EPA's atomic absorption spectroscopy and using dibenzyldithiocarbamate and liquid chromatography to form complexes. It is important for industries that produce these pollutant metals to ensure their environment is properly tested for potential health risks and toxic exposures.
Strategies for Reducing Factory Pollution in Cities: Skylines
You may want to see also
Explore related products
Priority Pollutants List creation
The Priority Pollutant List was created by the Environmental Protection Agency (EPA) in 1977 to make the implementation of the Toxic Pollutant List more practical for water testing and regulatory purposes. The Toxic Pollutant List, developed in 1976, contains 65 entries deemed toxic, including groupings of pollutants, and serves as a starting point for the EPA in regulating the disposal of these pollutants.
The Priority Pollutant List is more practical for testing and regulation as it lists chemicals by their individual names, rather than in open-ended groups as in the Toxic Pollutant List. For example, while the Toxic Pollutant List includes a group of pollutants called "chlorinated benzenes," which contains hundreds of compounds, the Priority Pollutant List lists each compound individually, making it easier to test and regulate.
In determining which pollutants are considered priority, the EPA used four main criteria: the pollutant must be specifically named on the list of toxic pollutants; there must be a chemical standard available to allow testing; the pollutant must be found in water with a frequency of at least 2.5%produced in significant quantities.
The Priority Pollutant List was also included to support regulations for the Steam Electric Power Generating Category, one of the first industrial categories for which the EPA developed Effluent Guidelines. While the other sections within Part 423 of the Clean Water Act apply only to this category, the Priority Pollutant List in Appendix A is not limited in relevance to just this category.
It is important to note that the Priority Pollutant List is not exhaustive, and the EPA considers a wider range of pollutants (toxic, conventional, and nonconventional) when developing Effluent Guidelines.
Noise Pollution: Harmful Effects and Prevention
You may want to see also
Explore related products
EPA's role
The EPA's role is to protect human health and the environment by developing and enforcing regulations to address environmental problems. Under the Clean Water Act, the EPA is responsible for ensuring that the nation's waters are safe for drinking, fishing, and swimming.
One of the key tools that the EPA uses to fulfil this responsibility is the Priority Pollutant List, which was developed in 1977 to make the implementation of the Toxic Pollutant List more practical for water testing and regulatory purposes. The Toxic Pollutant List, created in 1976, was added to the Clean Water Act by Congress in 1977. It was intended to be used by the EPA and states as a starting point to address the problems of toxics in waterways. However, it consisted of broad categories of pollutants rather than specific, individual pollutants, making it less practical for testing and regulation.
The Priority Pollutant List includes specific chemical names, making it more usable and practical for testing and regulation. The EPA used four criteria to select and prioritize specific pollutants for the list:
- All pollutants specifically named on the list of toxic pollutants were included.
- A chemical standard had to be available for testing.
- The pollutant had to have been reported as found in water with a frequency of occurrence of at least 2.5%.
- The pollutant had to have been produced in significant quantities, as reported in Stanford Research Institute's "1976 Directory of Chemical Producers, USA."
The Priority Pollutant List is not limited to a single industrial category and is used to support regulations for various industries. While portions of the list may be outdated, the EPA continues to consult it, along with states and authorized tribes, when developing ambient water quality criteria.
In addition to its work on water pollution, the EPA also plays a crucial role in addressing air pollution. The Clean Air Act requires the EPA to set National Ambient Air Quality Standards (NAAQS) for six commonly found air pollutants known as criteria air pollutants. The EPA works with state, tribal, and local air agencies to attain these standards throughout the country.
Light Pollution's Dark Side: Wind Farm Spread
You may want to see also
Frequently asked questions
It is a list of identified chemical pollutants that are regulated by the EPA. The list was developed in 1977 to make the implementation of the Toxic Pollutant List more practical for water testing and regulatory purposes.
The Toxic Pollutant List contains groupings of pollutants and open-ended groups of pollutants, such as "chlorinated benzenes". In contrast, the Priority Pollutant List describes chemicals by their individual chemical names, making it more practical for testing and regulation.
The Priority Pollutant List includes 126 chemicals, which can be divided into three separate categories. Some examples include metals, which can be toxic to human health when present in unusually high levels in water.
The lists have not been updated recently; however, the EPA continues to use them as a reference when developing ambient water quality criteria.
Industries that produce pollutant metals, such as industrial manufacturing, should ensure their environment is properly tested for potential health risks and toxic exposures.
