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The National Primary Drinking Water Regulations (NPDWR) are legally enforceable primary standards and treatment techniques that apply to public water systems. Primary standards and treatment techniques protect public health by limiting the levels of contaminants in drinking water.
Protecting America’s drinking water is a top priority for EPA. EPA has established protective drinking water standards for more than 90 contaminants, including drinking water regulations issued since the 1996 amendments to the Safe Drinking Water Act that strengthen public health protection.
The Safe Drinking Water Act (SDWA) gives individual states the opportunity to set and enforce their own drinking water standards if the standards are at a minimum as stringent as EPA's national standards. Below are the drinking water rule pages grouped by contaminant type.
It is the product of significant revisions to clarify and elaborate on ways of implementing its recommendations of contextual hazard identification and risk management, through the establishment of health-based targets, catchment-to-consumer water safety plans and independent surveillance.
This document summarizes EPA's drinking water regulations and health advisories, as well as reference dose (RFD) and cancer risk values, for drinking water contaminants. EPA updates the tables periodically.
The Safe Drinking Water Act (SDWA) is federal law that protects Americans' drinking water quality. Under SDWA, EPA sets standards for drinking water quality for both natural and man-made contaminants.
WHO produces a series of water quality guidelines, including on drinking-water, safe use of wastewater, and recreational water quality. The water quality guidelines are based on managing risks, and since 2004 the Guidelines for drinking-water quality promote the Framework for safe drinking-water.
Congress passed the Safe Drinking Water Act in 1974 to protect the nation's public drinking water. Under this law, EPA sets the standards for drinking water quality. EPA also monitors states, local authorities, and water suppliers who enforce those standards.
The Environmental Protection Agency (EPA) identifies contaminants to regulate in drinking water. The Agency sets regulatory limits for the amounts of certain contaminants in water provided by public water systems. These contaminant standards are required by the Safe Drinking Water Act (SDWA).
EPA has established protective drinking water standards for more than 90 contaminants, including drinking water regulations issued since the 1996 amendments to the Safe Drinking Water Act that strengthen public health protection.