G

Great Falls, MT

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️1 health-based violation on record.
0
Water sources
20
Violations
0
Pollution sources
0
Self-reported
0
Lawsuits

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Reported illness & cancer claims

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Self-reported issues

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Pollution sources & reported claims near your water

Factories, greenhouses, and contaminated sites mapped around the water supply. Tap any circle for detail.

Critical High Medium Reported claim

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Public water systems

Great Falls City Of

PWSID:
MT0000525
Source:
Surface water
Serves:
60,000 people

Big Stack Estates

PWSID:
MT0004682
Source:
Surface water
Serves:
60 people

Shade Tree Mobile Park

PWSID:
MT0004685
Source:
Surface water
Serves:
100 people

The Falls Mobile Home Community

PWSID:
MT0005077
Source:
Surface water
Serves:
60 people

Big Sky Mobile Home Park

PWSID:
MT0004683
Source:
Surface water
Serves:
40 people

Spring Tree Ridge

PWSID:
MT0004419
Source:
Ground water
Serves:
80 people

Big Bend Ranch Subdivision

PWSID:
MT0004261
Source:
Ground water
Serves:
100 people

Park Garden Estates

PWSID:
MT0000050
Source:
Ground water
Serves:
50 people

Rivers Edge Mobile Home Park Grt Fls

PWSID:
MT0004687
Source:
Surface water
Serves:
75 people

Sun Prairie Water District

PWSID:
MT0000571
Source:
Ground water
Serves:
350 people

Grandview Trailer Court

PWSID:
MT0004686
Source:
Surface water
Serves:
165 people

High Plains H2o Llc

PWSID:
MT0005192
Source:
Surface water
Serves:
25 people

Malmstrom Air Force Base

PWSID:
MT0000515
Source:
Surface water
Serves:
8,850 people

Gore Hill County Water Dist

PWSID:
MT0000232
Source:
Ground water
Serves:
500 people

Cobblestone Court

PWSID:
MT0004831
Source:
Surface water
Serves:
50 people

Sun Prairie Village County

PWSID:
MT0000521
Source:
Ground water
Serves:
1,800 people

Countryside Village MHP Grt Fls

PWSID:
MT0004830
Source:
Surface water
Serves:
600 people

Bushard Water Company

PWSID:
MT0005164
Source:
Surface water
Serves:
425 people

Sunset Mobile Home Park

PWSID:
MT0000584
Source:
Ground water
Serves:
45 people

Missouri Meadows Community Inc

PWSID:
MT0000053
Source:
Surface water
Serves:
85 people

Prairie Water Company

PWSID:
MT0003539
Source:
Surface water
Serves:
1,000 people

Pleasant Park Community Inc

PWSID:
MT0000028
Source:
Ground water
Serves:
125 people

South Wind Water And Sewer District

PWSID:
MT0000025
Source:
Ground water
Serves:
200 people

Rivershore Community Llc

PWSID:
MT0000414
Source:
Surface water
Serves:
90 people

Highwood Mobile Home Park

PWSID:
MT0004681
Source:
Surface water
Serves:
400 people

Great Falls Rv Park

PWSID:
MT0000027
Source:
Surface water
Serves:
274 people

Ryan Dam Water System

PWSID:
MT0000046
Source:
Ground water
Serves:
230 people

EPA & DEP violations

City-wide

20 violations

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Dec 1, 2025 · 8 months ago · Source ↗

  • E. COLI — MR violation

    medium severityResolved

    E. COLI MR violation (Resolved).

    EPA SDWIS · MR · Began Jul 22, 2025 · 1 year ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Jul 1, 2025 · 1 year ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Jul 1, 2025 · 1 year ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Jun 1, 2025 · 1 year ago · Source ↗

  • Nitrate-Nitrite — MR violation

    medium severityResolved

    Nitrate-Nitrite MR violation (Resolved).

    EPA SDWIS · MR · Began Jan 1, 2025 · 1 year ago · Source ↗

  • Nitrate-Nitrite — MR violation

    medium severityResolved

    Nitrate-Nitrite MR violation (Resolved).

    EPA SDWIS · MR · Began Jan 1, 2025 · 1 year ago · Source ↗

  • Nitrate-Nitrite — MR violation

    medium severityResolved

    Nitrate-Nitrite MR violation (Resolved).

    EPA SDWIS · MR · Began Jan 1, 2025 · 1 year ago · Source ↗

  • Nitrate-Nitrite — MR violation

    medium severityResolved

    Nitrate-Nitrite MR violation (Resolved).

    EPA SDWIS · MR · Began Jan 1, 2025 · 1 year ago · Source ↗

  • Lead and Copper Rule — MR violation

    medium severityResolved

    Lead and Copper Rule MR violation (Resolved).

    EPA SDWIS · MR · Began Dec 30, 2024 · 1 year ago · Source ↗

  • Lead and Copper Rule — MR violation

    medium severityResolved

    Lead and Copper Rule MR violation (Resolved).

    EPA SDWIS · MR · Began Dec 30, 2024 · 1 year ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Nov 1, 2024 · 1 year ago · Source ↗

  • Surface Water Treatment Rule — MR violation

    medium severityResolved

    Surface Water Treatment Rule MR violation (Resolved).

    EPA SDWIS · MR · Began Nov 1, 2024 · 1 year ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began Oct 18, 2024 · 1 year ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityUnaddressed

    Consumer Confidence Rule Other violation (Unaddressed).

    EPA SDWIS · Other · Began Oct 1, 2024 · 1 year ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Oct 1, 2024 · 1 year ago · Source ↗

  • Endrin — MR violation

    medium severityResolved

    Endrin MR violation (Resolved).

    EPA SDWIS · MR · Began Jul 1, 2024 · 2 years ago · Source ↗

  • BHC-GAMMA — MR violation

    medium severityResolved

    BHC-GAMMA MR violation (Resolved).

    EPA SDWIS · MR · Began Jul 1, 2024 · 2 years ago · Source ↗

  • Toxaphene — MR violation

    medium severityResolved

    Toxaphene MR violation (Resolved).

    EPA SDWIS · MR · Began Jul 1, 2024 · 2 years ago · Source ↗

  • OXAMYL — MR violation

    medium severityResolved

    OXAMYL MR violation (Resolved).

    EPA SDWIS · MR · Began Jul 1, 2024 · 2 years ago · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.