Federal and State Agencies
Submit a complaint, learn more about drinking water regulation, and find other resources.
California State Water Resources Control Board
- Information about regulation of drinking water from public water systems. 916-341-5300
- Submit a water rights complaint
U.S. Environmental Protection Agency
- Explore information about drinking water and regulation
- Get information about drinking water- contact the Safe Drinking Water Hotline at 800-426-4791 or safewater@epa.gov
- Ask a question
- Report a violation
Resources on In-home Water Treatment
If you are considering in-home treatment of your drinking water, be sure to use an approved device.
California State Water Resources Control Board
- Find information about in-home treatment devices registered for sale in California
National Sanitation Foundation (NSF)
- Look up a filter to see if it is effective for specific contaminants
- Learn about different filter standards
U.S. Environmental Protection Agency
- Find detailed information about treatment processes for over 120 regulated and unregulated drinking water contaminants