Water Quality in Great Falls, MT (59405)
EPA violation data for public water systems serving ZIP code 59405.
Active Health Violations
4 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 84% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
33,350
Population
43
Water Systems
31
Violations (5yr)
4
Health-Based
Location
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Water Systems Serving This Area (43)
Great Falls City Of
Montana Expo Park Cascade County
All resolvedUniversity Of Providence
All resolvedGiant Springs State Park
Old Skyline Bar Unapproved
Highwood Mobile Home Park
All resolvedGreat Falls Koa Kampground
All resolvedHeadquarters Building Region 4
South Wind Water And Sewer District
All resolvedHope Oak Knoll Campground
Heritage Baptist Church
1 health-basedPleasant Park Community Inc
All resolvedK M Scout Ranch Hilger
Dagwoods Restaurant
Praise Tabernacle Unapproved
Grassland Colony
Torgersons Equipment G Falls
Really Windys
Pacific Steel And Recycling
1 health-basedAnderson Steel Supply Inc
1 health-basedBoulder Ridge Bed And Breakfast
1 health-basedIsaak Walton League
Sports Motors % Larry Houck
Walton'S Spring
Big Sky Mobile Home Park
Kings Arena
All resolvedEast Bay Subdivision
All resolvedCraig Camp Recreation Area
John Guidotti Water Hauler
Ackley Lake Sra
Log Gulch (Beartooth) Cg
James Kipp Campground
57 Pony Espresso
Ackley Lake Sra Westside No 2
Gibson Lake Tracts Spring
Meadow Gold Dairy
Craig Camp Recreation Area
Yates Water Services
Pacific Steel And Recycling #50
Ayrshire Dairy
Associated Water, Inc.
Deep Creek School
4 J'S Trailer Court
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Annual water quality report delivery requirement.
Similar to nitrate — harmful to infants at high levels.
Lead & Copper Levels
Lead (Pb)
Approaching limitSampled: Jul 2025
How Does This Compare?
Great Falls (59405) has more violations than 84% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 31.
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.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) 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.