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EPA WATER QUALITY DATA · ID

Idaho Tap Water Quality by City

EPA UCMR5 PFAS monitoring data, violation history, and filter recommendations for 1 cities across Idaho. All data sourced directly from federal EPA databases.

1
Cities tracked
1
With PFAS violations
51 ppt
Highest PFAS detected
Highest contamination in Idaho: Boise — detected at 51 ppt (13× the EPA limit for PFOA/PFOS)
IDAHO CITIES — TAP WATER REPORTS
BoiseMEDIUM RISK3 MCL VIOLATIONS
Boise Public Works Water Division · Pop. 240K
51
ppt PFAS
ABOUT WATER QUALITY IN IDAHO

Idaho water quality varies significantly by city and water system. The EPA's UCMR5 monitoring program tested all systems serving 3,300+ people for 29 PFAS compounds between 2023 and 2025. In Idaho, 1 of the 1 tracked cities returned results with active MCL violations — meaning detected PFAS levels exceed the EPA's legally enforceable maximum.

Click any city above for a full breakdown of detected compounds, violation history, water hardness data, and certified filter recommendations matched to the actual contaminant profile of that system.

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