['Water Programs']

['Water Programs', 'Water Reporting', 'Toxic Water Pollutants', 'Water Analysis', 'Water Monitoring', 'Maximum Contaminant Levels']

11/24/2025

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Drinking Water MCLs for PFAS Chemicals — Idaho

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Drinking Water MCLs for PFAS Chemicals — Idaho

RegSense State Info Water Analysis Toxic Water Pollutants Water Programs Water Reporting Maximum Contaminant Levels Best Results Environmental Water Monitoring Water Programs Idaho English Focus Area CWA Compliance

Idaho follows the federal Maximum Contaminant Levels (MCLs). 

PFOA: 4 ppt (parts per trillion) 
PFOS: 4 ppt

Related information

Safe Drinking Water Act ezExplanation 
Drinking water (SDWA) ezExplanation 
IDEQ PFAS and Idaho Drinking Water
IDHW PFAS in Drinking Water

Citations

Idaho Administrative Code Rule 58.01.08.050(02)
Federal regulation 40 CFR Part 141 
Federal regulation 40 CFR Part 142 
Federal regulation 40 CFR Part 143

['Water Programs']

['Water Programs', 'Water Reporting', 'Toxic Water Pollutants', 'Water Analysis', 'Water Monitoring', 'Maximum Contaminant Levels']

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