WaterSafeCheck is a free online resource that helps people explore drinking water quality by ZIP code or city. It brings together publicly available information from EPA databases and utility Consumer Confidence Reports to provide coverage for more than 41,000 U.S. ZIP codes across all 50 states and Washington, D.C. Reports may include water safety grades, lead levels, detected contaminants, and health violations, with recommendations such as filter suggestions, utility contacts, and health resources.

The site also offers plain-English articles and guides on topics including lead, PFAS, disinfection byproducts, and how to understand a Consumer Confidence Report. Visitors can browse water quality reports for cities and states without creating an account. WaterSafeCheck does not conduct its own water testing and is not affiliated with the EPA or a government agency. Its information reflects historical monitoring and compliance records, so it may not represent current conditions. The site encourages users to contact their local water utility for current advisories and presents its content for educational purposes, not as medical or legal advice.