S

San Ysidro, NM

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️20 health-based violations on record.
0
Water sources
40
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

Dona Ana Mdwca

PWSID:
NM3554307
Source:
Ground water
Serves:
16,987 people

North San Ysidro Mdwca

PWSID:
NM3518225
Source:
Ground water
Serves:
133 people

San Ysidro Water Supply System

PWSID:
NM3509723
Source:
Ground water
Serves:
166 people

San Luis Cabezon Mdwca

PWSID:
NM3501823
Source:
Ground water
Serves:
320 people

South San Ysidro Mdwca

PWSID:
NM3519225
Source:
Ground water
Serves:
35 people

EPA & DEP violations

Dona Ana Mdwca

PWSID NM355430720 violations

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began Jul 17, 2024 · 2 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began May 12, 2024 · 2 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began May 12, 2024 · 2 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began May 12, 2024 · 2 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began May 12, 2024 · 2 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began May 12, 2024 · 2 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began May 12, 2024 · 2 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began May 12, 2024 · 2 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began May 12, 2024 · 2 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began May 12, 2024 · 2 years ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedResolved

    Groundwater Rule TT violation (Resolved).

    EPA SDWIS · TT · Began May 12, 2024 · 2 years ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began Mar 12, 2024 · 2 years ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began Mar 12, 2024 · 2 years ago · Source ↗

  • Chlorine — MR violation

    medium severityResolved

    Chlorine MR violation (Resolved).

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

  • Chlorine — MR violation

    medium severityResolved

    Chlorine MR violation (Resolved).

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

  • Chlorine — MR violation

    medium severityResolved

    Chlorine MR violation (Resolved).

    EPA SDWIS · MR · Began Jan 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 ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began Apr 15, 2022 · 4 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 ↗

North San Ysidro Mdwca

PWSID NM35182253 violations

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

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

  • Consumer Confidence Rule — Other violation

    medium severityResolved

    Consumer Confidence Rule Other violation (Resolved).

    EPA SDWIS · Other · Began Oct 1, 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 ↗

San Luis Cabezon Mdwca

PWSID NM35018235 violations

  • Public Notice — Other violation

    medium severityUnaddressed

    Public Notice Other violation (Unaddressed).

    EPA SDWIS · Other · Began Aug 24, 2025 · 11 months ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedUnaddressed

    Groundwater Rule TT violation (Unaddressed).

    EPA SDWIS · TT · Began Apr 8, 2025 · 1 year ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedUnaddressed

    Groundwater Rule TT violation (Unaddressed).

    EPA SDWIS · TT · Began Apr 8, 2025 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityUnaddressed

    LEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedUnaddressed

    LEAD AND COPPER RULE REVISIONS TT violation (Unaddressed).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

City-wide

12 violations

  • Groundwater Rule — TT violation

    high severityHealth-basedUnaddressed

    Groundwater Rule TT violation (Unaddressed).

    EPA SDWIS · TT · Began Jul 12, 2025 · 1 year ago · Source ↗

  • Groundwater Rule — TT violation

    high severityHealth-basedUnaddressed

    Groundwater Rule TT violation (Unaddressed).

    EPA SDWIS · TT · Began Jul 12, 2025 · 1 year ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began Nov 24, 2024 · 1 year ago · Source ↗

  • Public Notice — Other violation

    medium severityResolved

    Public Notice Other violation (Resolved).

    EPA SDWIS · Other · Began Nov 24, 2024 · 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 Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedResolved

    LEAD AND COPPER RULE REVISIONS TT violation (Resolved).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — RPT violation

    medium severityUnaddressed

    LEAD AND COPPER RULE REVISIONS RPT violation (Unaddressed).

    EPA SDWIS · RPT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • LEAD AND COPPER RULE REVISIONS — TT violation

    high severityHealth-basedUnaddressed

    LEAD AND COPPER RULE REVISIONS TT violation (Unaddressed).

    EPA SDWIS · TT · Began Oct 17, 2024 · 1 year ago · Source ↗

  • Fluoride — MCL violation

    high severityHealth-basedResolved

    Fluoride MCL violation (Resolved).

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

  • Fluoride — MCL violation

    high severityHealth-basedResolved

    Fluoride MCL violation (Resolved).

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

  • Fluoride — MCL violation

    high severityHealth-basedResolved

    Fluoride MCL violation (Resolved).

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

  • Total Haloacetic Acids (HAA5) — MR violation

    medium severityResolved

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

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

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.