C

Chelsea, MI

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️4 health-based violations on record.
0
Water sources
13
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

Chelsea

PWSID:
MI0001370
Source:
Ground water
Serves:
5,474 people

Sylvan Township

PWSID:
MI0006531
Source:
Ground water
Serves:
263 people

St. Louis Center

PWSID:
MI0006325
Source:
Ground water
Serves:
56 people

EPA & DEP violations

Chelsea

PWSID MI00013701 violation

  • Violation — Violation violation

    medium severity

    Contaminant Violation violation.

    EPA SDWIS · Violation · Began — · Source ↗

City-wide

12 violations

  • Arsenic — MR violation

    medium severityArchived

    Arsenic MR violation (Archived).

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

  • Arsenic — MR violation

    medium severityArchived

    Arsenic MR violation (Archived).

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

  • Arsenic — MR violation

    medium severityArchived

    Arsenic MR violation (Archived).

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

  • Revised Total Coliform Rule — RPT violation

    medium severityResolved

    Revised Total Coliform Rule RPT violation (Resolved).

    EPA SDWIS · RPT · Began Dec 11, 2024 · 1 year ago · Source ↗

  • Arsenic — MCL violation

    high severityHealth-basedResolved

    Arsenic MCL violation (Resolved).

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

  • Arsenic — MCL violation

    high severityHealth-basedResolved

    Arsenic MCL violation (Resolved).

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

  • Arsenic — MCL violation

    high severityHealth-basedResolved

    Arsenic MCL violation (Resolved).

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

  • Arsenic — MCL violation

    high severityHealth-basedResolved

    Arsenic MCL violation (Resolved).

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

  • Styrene — MR violation

    medium severityResolved

    Styrene MR violation (Resolved).

    EPA SDWIS · MR · Began Jul 1, 2022 · 4 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 ↗

  • E. COLI — MR violation

    medium severityResolved

    E. COLI MR violation (Resolved).

    EPA SDWIS · MR · Began Nov 25, 2016 · 9 years ago · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.