A

Ann Arbor, MI

B48/100

Contamination score

Higher = more contaminated vs. other cities.

0
Water sources
42
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

Ann Arbor

PWSID:
MI0000220
Source:
Surface water
Serves:
123,851 people

Scio Township

PWSID:
MI0005977
Source:
Surface water
Serves:
8,500 people

Pittsfield Township

PWSID:
MI0005360
Source:
Surface water
Serves:
24,500 people

Loch Alpine Sanitary Authority

PWSID:
MI0003940
Source:
Ground water
Serves:
1,506 people

Barton Hills

PWSID:
MI0000430
Source:
Ground water
Serves:
450 people

Ann Arbor Township

PWSID:
MI0000221
Source:
Surface water
Serves:
1,338 people

Sisters Of Mary, Mother Of Eucharist

PWSID:
MI0006074
Source:
Ground water
Serves:
100 people

EPA & DEP violations

Ann Arbor

PWSID MI00002202 violations

  • Cryptosporidium — MR violation

    medium severityResolved

    Cryptosporidium MR violation (Resolved).

    EPA SDWIS · MR · Began Nov 1, 2016 · 9 years ago · Source ↗

  • Monitoring violation — ANN ARBOR

    low severityResolved

    EPA SDWIS violation 4001211 (code 32) at ANN ARBOR (PWSID MI0000220).

    EPA SDWIS · Monitoring violation · Began Nov 1, 2016 · 9 years ago · Source ↗

Scio Township

PWSID MI00059774 violations

  • Reporting violation — SCIO TOWNSHIP

    low severityResolved

    EPA SDWIS violation 3000215 (code 4B) at SCIO TOWNSHIP (PWSID MI0005977).

    EPA SDWIS · Reporting violation · Began Nov 11, 2024 · 1 year ago · Source ↗

  • Reporting violation — SCIO TOWNSHIP

    low severityResolved

    EPA SDWIS violation 3000214 (code 4B) at SCIO TOWNSHIP (PWSID MI0005977).

    EPA SDWIS · Reporting violation · Began Nov 11, 2023 · 2 years ago · Source ↗

  • Monitoring violation — SCIO TOWNSHIP

    low severityResolved

    EPA SDWIS violation 3000213 (code 52) at SCIO TOWNSHIP (PWSID MI0005977).

    EPA SDWIS · Monitoring violation · Began Oct 11, 2022 · 3 years ago · Source ↗

  • Other violation — SCIO TOWNSHIP

    low severityResolved

    EPA SDWIS violation 3000211 (code 71) at SCIO TOWNSHIP (PWSID MI0005977).

    EPA SDWIS · Other violation · Began Jul 1, 2021 · 5 years ago · Source ↗

Pittsfield Township

PWSID MI00053606 violations

  • Other violation — PITTSFIELD TOWNSHIP

    low severityResolved

    EPA SDWIS violation 13 (code 72) at PITTSFIELD TOWNSHIP (PWSID MI0005360).

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

  • Monitoring violation — PITTSFIELD TOWNSHIP

    low severityResolved

    EPA SDWIS violation 11 (code 27) at PITTSFIELD TOWNSHIP (PWSID MI0005360).

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

  • Monitoring violation — PITTSFIELD TOWNSHIP

    low severityResolved

    EPA SDWIS violation 12 (code 27) at PITTSFIELD TOWNSHIP (PWSID MI0005360).

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

  • Monitoring violation — PITTSFIELD TOWNSHIP

    low severityResolved

    EPA SDWIS violation 10 (code 27) at PITTSFIELD TOWNSHIP (PWSID MI0005360).

    EPA SDWIS · Monitoring violation · Began Oct 1, 2022 · 3 years ago · Source ↗

  • Monitoring violation — PITTSFIELD TOWNSHIP

    low severityResolved

    EPA SDWIS violation 1 (code 27) at PITTSFIELD TOWNSHIP (PWSID MI0005360).

    EPA SDWIS · Monitoring violation · Began Dec 1, 2017 · 8 years ago · Source ↗

  • Monitoring violation — PITTSFIELD TOWNSHIP

    low severityResolved

    EPA SDWIS violation 2 (code 27) at PITTSFIELD TOWNSHIP (PWSID MI0005360).

    EPA SDWIS · Monitoring violation · Began Dec 1, 2017 · 8 years ago · Source ↗

Loch Alpine Sanitary Authority

PWSID MI00039404 violations

  • Reporting violation — LOCH ALPINE SANITARY AUTHORITY

    low severityOpen

    EPA SDWIS violation 4000203 (code 4H) at LOCH ALPINE SANITARY AUTHORITY (PWSID MI0003940).

    EPA SDWIS · Reporting violation · Began Jul 2, 2025 · 1 year ago · Source ↗

  • Monitoring violation — LOCH ALPINE SANITARY AUTHORITY

    low severityResolved

    EPA SDWIS violation 4000202 (code 52) at LOCH ALPINE SANITARY AUTHORITY (PWSID MI0003940).

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

  • Monitoring violation — LOCH ALPINE SANITARY AUTHORITY

    low severityResolved

    EPA SDWIS violation 4000195 (code 27) at LOCH ALPINE SANITARY AUTHORITY (PWSID MI0003940).

    EPA SDWIS · Monitoring violation · Began Aug 1, 2020 · 6 years ago · Source ↗

  • Monitoring violation — LOCH ALPINE SANITARY AUTHORITY

    low severityResolved

    EPA SDWIS violation 4000196 (code 27) at LOCH ALPINE SANITARY AUTHORITY (PWSID MI0003940).

    EPA SDWIS · Monitoring violation · Began Aug 1, 2020 · 6 years ago · Source ↗

Barton Hills

PWSID MI00004303 violations

  • Reporting violation — BARTON HILLS

    low severityOpen

    EPA SDWIS violation 4000313 (code 4H) at BARTON HILLS (PWSID MI0000430).

    EPA SDWIS · Reporting violation · Began Jul 2, 2025 · 1 year ago · Source ↗

  • Other violation — BARTON HILLS

    low severityResolved

    EPA SDWIS violation 4000312 (code 72) at BARTON HILLS (PWSID MI0000430).

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

  • Reporting violation — BARTON HILLS

    low severityResolved

    EPA SDWIS violation 4000311 (code 4B) at BARTON HILLS (PWSID MI0000430).

    EPA SDWIS · Reporting violation · Began May 11, 2020 · 6 years ago · Source ↗

Ann Arbor Township

PWSID MI00002213 violations

  • Monitoring violation — ANN ARBOR TOWNSHIP

    low severityResolved

    EPA SDWIS violation 4000902 (code 27) at ANN ARBOR TOWNSHIP (PWSID MI0000221).

    EPA SDWIS · Monitoring violation · Began Dec 1, 2016 · 9 years ago · Source ↗

  • Monitoring violation — ANN ARBOR TOWNSHIP

    low severityResolved

    EPA SDWIS violation 4000903 (code 27) at ANN ARBOR TOWNSHIP (PWSID MI0000221).

    EPA SDWIS · Monitoring violation · Began Dec 1, 2016 · 9 years ago · Source ↗

  • Other violation — ANN ARBOR TOWNSHIP

    low severityResolved

    EPA SDWIS violation 4000901 (code 71) at ANN ARBOR TOWNSHIP (PWSID MI0000221).

    EPA SDWIS · Other violation · Began Jul 1, 2001 · 25 years ago · Source ↗

Sisters Of Mary, Mother Of Eucharist

PWSID MI00060741 violation

  • Monitoring violation — SISTERS OF MARY, MOTHER OF EUCHARIST

    low severityResolved

    EPA SDWIS violation 1 (code 27) at SISTERS OF MARY, MOTHER OF EUCHARIST (PWSID MI0006074).

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

City-wide

19 violations

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityUnaddressed

    LEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).

    EPA SDWIS · RPT · Began Jul 2, 2025 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityResolved

    LEAD AND COPPER RULE REVISIONS RPT violation (Resolved).

    EPA SDWIS · RPT · Began Jul 2, 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 — RPT violation

    medium severityResolved

    Revised Total Coliform Rule RPT violation (Resolved).

    EPA SDWIS · RPT · Began Nov 11, 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 ↗

  • Revised Total Coliform Rule — RPT violation

    medium severityResolved

    Revised Total Coliform Rule RPT violation (Resolved).

    EPA SDWIS · RPT · Began Nov 11, 2023 · 2 years ago · Source ↗

  • Lead and Copper Rule — MR violation

    medium severityResolved

    Lead and Copper Rule MR violation (Resolved).

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

  • TTHM — MR violation

    medium severityResolved

    TTHM MR violation (Resolved).

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

  • Total Haloacetic Acids (HAA5) — MR violation

    medium severityResolved

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

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

  • Lead and Copper Rule — MR violation

    medium severityResolved

    Lead and Copper Rule MR violation (Resolved).

    EPA SDWIS · MR · Began Oct 11, 2022 · 3 years ago · Source ↗

  • Total Haloacetic Acids (HAA5) — MR violation

    medium severityResolved

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

    EPA SDWIS · MR · Began Oct 1, 2022 · 3 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 ↗

  • TTHM — MR violation

    medium severityResolved

    TTHM MR violation (Resolved).

    EPA SDWIS · MR · Began Aug 1, 2020 · 6 years ago · Source ↗

  • Total Haloacetic Acids (HAA5) — MR violation

    medium severityResolved

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

    EPA SDWIS · MR · Began Aug 1, 2020 · 6 years ago · Source ↗

  • Revised Total Coliform Rule — RPT violation

    medium severityResolved

    Revised Total Coliform Rule RPT violation (Resolved).

    EPA SDWIS · RPT · Began May 11, 2020 · 6 years ago · Source ↗

  • Total Haloacetic Acids (HAA5) — MR violation

    medium severityResolved

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

    EPA SDWIS · MR · Began Dec 1, 2017 · 8 years ago · Source ↗

  • TTHM — MR violation

    medium severityResolved

    TTHM MR violation (Resolved).

    EPA SDWIS · MR · Began Dec 1, 2017 · 8 years ago · Source ↗

  • Total Haloacetic Acids (HAA5) — MR violation

    medium severityResolved

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

    EPA SDWIS · MR · Began Dec 1, 2016 · 9 years ago · Source ↗

  • TTHM — MR violation

    medium severityResolved

    TTHM MR violation (Resolved).

    EPA SDWIS · MR · Began Dec 1, 2016 · 9 years ago · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.