Water Quality Articles
Data-driven analysis of drinking water quality across US counties — rankings, violation reports, and insights built on EPA Safe Drinking Water data.
March 10, 2026
Understanding Drinking Water Quality by County
A data-driven analysis of drinking water quality across all US counties. How EPA SDWIS data reveals geographic patterns, grade distributions, and what drives water quality differences.
March 10, 2026
EPA Water Violations: What They Mean for Your Tap Water
What EPA drinking water violations actually mean, the different types of violations, which counties have the most, and what you can do if your county has a low water quality score.
March 10, 2026
Best and Worst Counties for Water Quality in America
The 25 best and 25 worst counties for drinking water quality in the United States, ranked by EPA compliance data. Geographic patterns, common factors, and what it means for residents.