M

Merrillville, IN

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️6 health-based violations on record.
0
Water sources
21
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

Indiana American Water - Northwest

PWSID:
IN5245015
Source:
Surface water
Serves:
210,510 people

Cuii - Indiana Water Service

PWSID:
IN5245057
Source:
Surface water
Serves:
4,200 people

Crossings Mobile Home Park

PWSID:
IN5245014
Source:
Ground water
Serves:
100 people

Rockwell Shores Apartments

PWSID:
IN5245002
Source:
Ground water
Serves:
45 people

EPA & DEP violations

Indiana American Water - Northwest

PWSID IN52450151 violation

  • Surface Water Treatment Rule — TT violation

    high severityHealth-basedResolved

    Surface Water Treatment Rule TT violation (Resolved).

    EPA SDWIS · TT · Began Sep 1, 2013 · 12 years ago · Source ↗

City-wide

20 violations

  • Revised Total Coliform Rule — MCL violation

    high severityHealth-basedResolved

    Revised Total Coliform Rule MCL violation (Resolved).

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

  • Gross Alpha, Excl. Radon and U — MR violation

    medium severityResolved

    Gross Alpha, Excl. Radon and U MR violation (Resolved).

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

  • Radium-226 — MR violation

    medium severityResolved

    Radium-226 MR violation (Resolved).

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

  • Radium-228 — MR violation

    medium severityResolved

    Radium-228 MR violation (Resolved).

    EPA SDWIS · MR · 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 Apr 11, 2022 · 4 years ago · Source ↗

  • E. COLI — MR violation

    medium severityResolved

    E. COLI MR violation (Resolved).

    EPA SDWIS · MR · Began Aug 26, 2020 · 5 years ago · Source ↗

  • Lead and Copper Rule — TT violation

    high severityHealth-basedResolved

    Lead and Copper Rule TT violation (Resolved).

    EPA SDWIS · TT · Began Jan 1, 2019 · 7 years ago · Source ↗

  • Gross Alpha, Excl. Radon and U — MR violation

    medium severityResolved

    Gross Alpha, Excl. Radon and U MR violation (Resolved).

    EPA SDWIS · MR · Began Apr 1, 2018 · 8 years ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Jul 1, 2015 · 11 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

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

  • E. COLI — MR violation

    medium severityResolved

    E. COLI MR violation (Resolved).

    EPA SDWIS · MR · Began Nov 27, 2014 · 11 years ago · Source ↗

  • Coliform (TCR) — MR violation

    medium severityResolved

    Coliform (TCR) MR violation (Resolved).

    EPA SDWIS · MR · Began Nov 1, 2014 · 11 years ago · Source ↗

  • Coliform (TCR) — MR violation

    medium severityResolved

    Coliform (TCR) MR violation (Resolved).

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

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

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

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

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

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Oct 1, 2013 · 12 years ago · Source ↗

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Jul 1, 2013 · 13 years ago · Source ↗

  • Coliform (TCR) — MR violation

    medium severityResolved

    Coliform (TCR) MR violation (Resolved).

    EPA SDWIS · MR · Began Sep 1, 2012 · 13 years ago · Source ↗

  • Coliform (TCR) — MCL violation

    high severityHealth-basedResolved

    Coliform (TCR) MCL violation (Resolved).

    EPA SDWIS · MCL · Began Sep 1, 2012 · 13 years ago · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.