C

Chester, MT

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️8 health-based violations 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

Chester Town Of

PWSID:
MT0000173
Source:
Surface water
Serves:
870 people

South Chester Water Dist

PWSID:
MT0000007
Source:
Surface water
Serves:
55 people

Sage Creek Colony

PWSID:
MT0001779
Source:
Ground water
Serves:
130 people

Sunny Brook Colony

PWSID:
MT0005121
Source:
Ground water
Serves:
80 people

Riverview Colony

PWSID:
MT0001777
Source:
Surface water
Serves:
130 people

Eagle Creek Colony

PWSID:
MT0003152
Source:
Ground water
Serves:
125 people

Sage Creek Co Water District

PWSID:
MT0003150
Source:
Ground water
Serves:
225 people

EPA & DEP violations

Chester Town Of

PWSID MT00001731 violation

  • Lead and Copper Rule — MR violation

    medium severityUnaddressed

    Lead and Copper Rule MR violation (Unaddressed).

    EPA SDWIS · MR · Began Oct 1, 2025 · 10 months ago · Source ↗

Eagle Creek Colony

PWSID MT00031521 violation

  • Groundwater Rule — MR violation

    medium severityResolved

    Groundwater Rule MR violation (Resolved).

    EPA SDWIS · MR · Began Jun 1, 2021 · 5 years ago · Source ↗

City-wide

18 violations

  • Total Haloacetic Acids (HAA5) — MCL violation

    high severityHealth-basedUnaddressed

    Total Haloacetic Acids (HAA5) MCL violation (Unaddressed).

    EPA SDWIS · MCL · Began Apr 1, 2026 · 4 months ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityUnaddressed

    Consumer Confidence Rule Other violation (Unaddressed).

    EPA SDWIS · Other · Began Oct 1, 2025 · 10 months ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

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

  • Total Haloacetic Acids (HAA5) — MCL violation

    high severityHealth-basedResolved

    Total Haloacetic Acids (HAA5) MCL violation (Resolved).

    EPA SDWIS · MCL · 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 ↗

  • Total Haloacetic Acids (HAA5) — MCL violation

    high severityHealth-basedResolved

    Total Haloacetic Acids (HAA5) MCL violation (Resolved).

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

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

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

  • Nitrate-Nitrite — MR violation

    medium severityResolved

    Nitrate-Nitrite MR violation (Resolved).

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

  • Total Haloacetic Acids (HAA5) — MCL violation

    high severityHealth-basedResolved

    Total Haloacetic Acids (HAA5) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Jul 1, 2023 · 3 years ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Jul 1, 2023 · 3 years ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Jul 1, 2022 · 4 years ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Oct 1, 2021 · 4 years ago · Source ↗

  • Total Haloacetic Acids (HAA5) — MCL violation

    high severityHealth-basedResolved

    Total Haloacetic Acids (HAA5) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Apr 1, 2021 · 5 years ago · Source ↗

  • Total Haloacetic Acids (HAA5) — MCL violation

    high severityHealth-basedResolved

    Total Haloacetic Acids (HAA5) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Jan 1, 2021 · 5 years ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Oct 1, 2020 · 5 years ago · Source ↗

  • Total Haloacetic Acids (HAA5) — MCL violation

    high severityHealth-basedResolved

    Total Haloacetic Acids (HAA5) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Oct 1, 2020 · 5 years ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Jul 1, 2020 · 6 years ago · Source ↗

  • Total Haloacetic Acids (HAA5) — MCL violation

    high severityHealth-basedResolved

    Total Haloacetic Acids (HAA5) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Jul 1, 2020 · 6 years ago · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.