This page provides resources to assist drinking water system owners and operators in complying with drinking water regulations.

Guidance documents by regulation:

Chemical contaminants

• Arsenic rule
• Chemical contaminant rules
• Lead and copper rule
• Radionuclides rule

Microbial contaminants

• Aircraft drinking water rule
• Filter backwash recycling rule
• Ground water rule
• Interim enhanced surface water treatment rule
• Long term 1 surface water treatment rule
• Long term 2 surface water treatment rule
• Surface water treatment rule
• Stage 1 and 2 disinfectant/disinfection byproducts
• Total coliform rule and the revised total coliform rule

Right-to-know rules

• Consumer confidence reports
• Public notification rule

There is small system guidance developed to help states, technical assistance providers, and small systems identify their compliance options.