Water Quality in Great Falls, MT (59421)
EPA violation data for public water systems serving ZIP code 59421.
Past Health-Based Violations
3 health-based violations were found in the past 5 years, meaning contaminant levels exceeded federal safety limits. All have since been resolved. There is also 1 monitoring/reporting violation.
More violations than 48% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
2,069
Population
10
Water Systems
4
Violations (5yr)
3
Health-Based
Location
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Water Systems Serving This Area (10)
Great Falls City Of
Helena Water System
3 health-basedCascade Town Of
Missouri River Bar And Grill
All resolvedFly Fishers Inn
Dearborn Country Inn Cascade
Sawtooth Villa
Dearborn Steakhouse
Rocky Mountain Cafe & Tavern
Dearborn Inn
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
Lead & Copper Levels
Lead (Pb)
Approaching limitSampled: Jul 2025
How Does This Compare?
Great Falls (59421) has more violations than 48% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 4.
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.