Articles
What's actually in American drinking water
Guides built from the same data as the ratings: EPA monitoring files and utility reports, read properly and explained in plain language. Every statistic is cited.
National analysis
PFAS in US tap water: what EPA's own testing found, state by state
EPA tested 10,297 community water systems for PFAS under UCMR 5. We analysed every result: 3,539 systems had a detection, serving 152 million people.
National analysis
58 million Americans drink from systems that broke drinking water law since 2020
We processed 6.7 million EPA violation records. 1,037,357 were health-based, across 33,350 water systems. 11,863 systems have breached a health standa
Explainer
How to read your water quality report without a chemistry degree
Your utility mails you a Consumer Confidence Report every year. Here is what each column actually means, which numbers matter, and the three places th
Buying guide
Do water filters actually remove PFAS?
Most filter pitchers are certified only for chlorine and taste, and do essentially nothing for PFAS. Here are the two certifications that actually mea