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Maximum contaminant levels (MCLs) are standards that are set by the United States Environmental Protection Agency (EPA) for drinking water quality. [ 1 ] [ 2 ] An MCL is the legal threshold limit on the amount of a substance that is allowed in public water systems under the Safe Drinking Water Act (SDWA).
The relatively short Secondary Regulations at Part 143 provide guidance for aesthetic characteristics, including taste, color, and odor, but do not actually regulate public water systems. "The regulations are not Federally enforceable but are intended as guidelines for the States."
The US Environmental Protection Agency (EPA) regulates the allowable levels of some contaminants in public water systems. [29] There may also be numerous contaminants in tap water that are not regulated by EPA and yet potentially harmful to human health.
The Clean Water Act is the primary federal law in the United States governing water pollution, and is administered by EPA and state environmental agencies. [31] Groundwater is protected at the federal level principally through: The Resource Conservation and Recovery Act, through regulation of the disposal of municipal solid waste and hazardous ...
The Safe Drinking Water Act (SDWA) is the primary federal law in the United States intended to ensure safe drinking water for the public. [3] Pursuant to the act, the Environmental Protection Agency (EPA) is required to set standards for drinking water quality and oversee all states, localities, and water suppliers that implement the standards.
EPA illustration of lead sources in residential buildings Infographic about lead in drinking water. The Lead and Copper Rule (LCR) is a United States federal regulation that limits the concentration of lead and copper allowed in public drinking water at the consumer's tap, as well as limiting the permissible amount of pipe corrosion occurring due to the water itself. [1]
* means action level; not a concentration standard. A public water system exceeding the action level must implement "treatment techniques" which are enforceable procedures. [14] ** TT (treatment technique). The public water system must certify that the combination of dose and monomer level does not exceed: acrylamide = 0.05% dosed at 1 mg/L (or ...
Furthermore, the EPA has created "guidelines", called the Enforcement Response Policy, that establish specific techniques to solve pollution problems and sources of pollution that should be dealt with. Although states are not legally required to abide by these "guidelines", the EPA uses them as a measurement of compliance.
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