A

Antelope, MT

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️7 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

Antelope County Water And Sewer

PWSID:
MT0003203
Source:
Surface water
Serves:
59 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 ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Dec 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 Jun 1, 2023 · 3 years ago · Source ↗

  • Total Haloacetic Acids (HAA5) — MR violation

    medium severityResolved

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

    EPA SDWIS · MR · Began Jan 1, 2023 · 3 years ago · Source ↗

  • TTHM — MR violation

    medium severityResolved

    TTHM MR violation (Resolved).

    EPA SDWIS · MR · Began Jan 1, 2023 · 3 years ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

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

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Jul 1, 2021 · 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 ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Jan 1, 2020 · 6 years ago · Source ↗

  • Revised Total Coliform Rule — MON violation

    medium severityResolved

    Revised Total Coliform Rule MON violation (Resolved).

    EPA SDWIS · MON · Began Sep 1, 2019 · 6 years ago · Source ↗

  • TTHM — MR violation

    medium severityResolved

    TTHM MR violation (Resolved).

    EPA SDWIS · MR · Began Aug 31, 2019 · 6 years ago · Source ↗

  • Total Haloacetic Acids (HAA5) — MR violation

    medium severityResolved

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

    EPA SDWIS · MR · Began Aug 31, 2019 · 6 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, 2015 · 11 years ago · Source ↗

  • TTHM — MCL violation

    high severityHealth-basedResolved

    TTHM MCL violation (Resolved).

    EPA SDWIS · MCL · Began Apr 1, 2015 · 11 years ago · Source ↗

  • TTHM — MCL violation

    high severityHealth-basedResolved

    TTHM MCL violation (Resolved).

    EPA SDWIS · MCL · Began Jan 1, 2015 · 11 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, 2015 · 11 years ago · Source ↗

  • TTHM — MCL violation

    high severityHealth-basedResolved

    TTHM MCL violation (Resolved).

    EPA SDWIS · MCL · Began Oct 1, 2014 · 11 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, 2014 · 11 years ago · Source ↗

  • Chlorine — MR violation

    medium severityResolved

    Chlorine MR violation (Resolved).

    EPA SDWIS · MR · Began Jul 1, 2014 · 12 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, 2014 · 12 years ago · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

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