National Primary Drinking Water Regulations

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.

• Microorganisms
• Disinfectants
• Disinfection Byproducts
• Inorganic Chemicals
• Organic Chemicals
• Radionuclides

Printable version: Complete NPDWR Table