Great Falls, MT Water Quality Report
Is Great Falls tap water safe? See PFAS and lead contamination levels for Great Falls, Montana. Compare to EPA limits and get filter recommendations.
Quick Answers
Is Great Falls, MT tap water safe to drink? Great Falls, MT tap water meets most federal EPA limits, but PFAS compounds have been detected at an average of 0.01 ppt across 1 compound. A certified pitcher filter or reverse osmosis system is recommended for sensitive populations.
What contaminants are in Great Falls, MT water? Top PFAS compounds detected in Great Falls water: PFBA (0.01 ppt). See the full table for all monitored contaminants and comparison to EPA limits.
What filter should I use in Great Falls, MT? Match the filter to what's in Montana water: reverse osmosis handles PFAS, lead, and arsenic together (90%+ removal); NSF-53 certified pitchers like Clearly Filtered or ZeroWater cover taps you drink from. A standard Brita pitcher will not remove PFAS.
Great Falls, MT Water Quality Summary
EPA testing has detected PFAS "forever chemicals" in Great Falls, MT drinking water. Recent monitoring found a peak level of 0.01 ppt across 1 water system, representing an average of 0.01 ppt across 1 detected compound.
Contamination Level: LOW – Low contamination – PFAS detected but at lower levels; monitoring continues.
Top Detected Compounds
- PFBA: 0.01 ppt
Lead in Great Falls, MT Water
EPA Lead and Copper Rule testing has recorded 62 lead samples for Great Falls water systems, with a 90th-percentile high of 0.012 mg/L (within the EPA 0.015 mg/L action level). There is no safe level of lead for children; if your home was built before 1986, a certified NSF/ANSI 53 lead-removal filter is recommended.
EPA Violations in Great Falls, MT
Great Falls public water systems have 19 health-based EPA Safe Drinking Water Act violations on record, including Chromium, Nitrite, Total Trihalomethanes. Health-based violations mean a contaminant exceeded its federal limit or required treatment was not applied.
About the Data
These figures come from the EPA's Unregulated Contaminant Monitoring Rule 5 (UCMR5) testing program, 2023-2025. UCMR5 is the most comprehensive national drinking water survey in US history, covering 66,000+ public water systems. Population of Great Falls, MT: approximately 59,351.
ZIP Codes Served
What Great Falls, Montana Residents Should Do
- Enter your exact ZIP code at knowyourexposure.com for address-level data
- If anyone in your household is pregnant or under 5, prioritize a certified PFAS filter now and consider a home test kit
- For long-term protection, an NSF/ANSI 58 reverse osmosis system removes 94-99% of PFAS
- Read the Consumer Confidence Report (CCR) your Montana utility publishes each year