10-Year Drinking Water Contamination Trends (UCMR3 to UCMR5)

Side-by-side trend reports comparing EPA UCMR3 (2013-2015) to UCMR5 (2023-2025) PFAS detections. 50 state pages, 200 top city pages, plus dedicated improving/worsening hubs covering every utility tested in both cycles.

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This index links to 252 pages organized into 6 categories for easy browsing.

Featured trend reports

Northeast state trends (9)

Midwest state trends (12)

South state trends (16)

West state trends (13)

Top 200 city trend pages