N

Norco, CA

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️1 health-based violation 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

Norco, City Of

PWSID:
CA3310025
Source:
Surface water
Serves:
25,068 people

EPA & DEP violations

Norco, City Of

PWSID CA331002520 violations

  • TTHM — MCL violation

    high severityHealth-basedArchived

    TTHM MCL violation (Archived).

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

  • Fluoride — MR violation

    medium severityResolved

    Fluoride MR violation (Resolved).

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

  • Mercury — MR violation

    medium severityResolved

    Mercury MR violation (Resolved).

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

  • Nickel — MR violation

    medium severityResolved

    Nickel MR violation (Resolved).

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

  • Nitrite — MR violation

    medium severityResolved

    Nitrite MR violation (Resolved).

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

  • Beryllium, Total — MR violation

    medium severityResolved

    Beryllium, Total MR violation (Resolved).

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

  • Antimony, Total — MR violation

    medium severityResolved

    Antimony, Total MR violation (Resolved).

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

  • Thallium, Total — MR violation

    medium severityResolved

    Thallium, Total MR violation (Resolved).

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

  • Selenium — MR violation

    medium severityResolved

    Selenium MR violation (Resolved).

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

  • Methoxychlor — MR violation

    medium severityResolved

    Methoxychlor MR violation (Resolved).

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

  • Dalapon — MR violation

    medium severityResolved

    Dalapon MR violation (Resolved).

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

  • Barium — MR violation

    medium severityResolved

    Barium MR violation (Resolved).

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

  • Cadmium — MR violation

    medium severityResolved

    Cadmium MR violation (Resolved).

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

  • Chromium — MR violation

    medium severityResolved

    Chromium MR violation (Resolved).

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

  • Endothall — MR violation

    medium severityResolved

    Endothall MR violation (Resolved).

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

  • Glyphosate — MR violation

    medium severityResolved

    Glyphosate MR violation (Resolved).

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

  • Di(2-ethylhexyl) adipate — MR violation

    medium severityResolved

    Di(2-ethylhexyl) adipate MR violation (Resolved).

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

  • OXAMYL — MR violation

    medium severityResolved

    OXAMYL MR violation (Resolved).

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

  • Simazine — MR violation

    medium severityResolved

    Simazine MR violation (Resolved).

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

  • Dinoseb — MR violation

    medium severityResolved

    Dinoseb MR violation (Resolved).

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

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.