H

Harlem, MT

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️15 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

Harlem City Of

PWSID:
MT0000239
Source:
Surface water
Serves:
820 people

North Harlem Colony

PWSID:
MT0001771
Source:
Ground water
Serves:
42 people

EPA & DEP violations

Harlem City Of

PWSID MT000023920 violations

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

    EPA SDWIS · MCL · Began Jan 1, 2026 · 7 months ago · Source ↗

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

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

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

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

  • Revised Total Coliform Rule — TT violation

    high severityHealth-basedUnaddressed

    Revised Total Coliform Rule TT violation (Unaddressed).

    EPA SDWIS · TT · Began Aug 26, 2025 · 11 months ago · Source ↗

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

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

  • Total Haloacetic Acids (HAA5) — MR violation

    medium severityResolved

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

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

  • TTHM — MR violation

    medium severityResolved

    TTHM MR violation (Resolved).

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

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

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

  • Lead and Copper Rule — MR violation

    medium severityUnaddressed

    Lead and Copper Rule MR violation (Unaddressed).

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

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

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

  • Total Haloacetic Acids (HAA5) — MCL violation

    high severityHealth-basedArchived

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

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

  • Long Term 2 Enhanced Surface Water Treatment Rule — TT violation

    high severityHealth-basedResolved

    Long Term 2 Enhanced Surface Water Treatment Rule TT violation (Resolved).

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

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

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

  • Total Haloacetic Acids (HAA5) — MCL violation

    high severityHealth-basedArchived

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

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

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

    EPA SDWIS · MCL · Began Apr 1, 2024 · 2 years ago · Source ↗

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

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

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

    EPA SDWIS · MCL · Began Oct 1, 2023 · 2 years ago · Source ↗

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

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

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

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

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.