S

San Marcos, TX

—no score

Contamination score

Higher = more contaminated vs. other cities.

⚠️2 health-based violations on record.
0
Water sources
6
Violations
0
Pollution sources
0
Self-reported
0
Lawsuits

Share this with friends & family you care about ❤️

Help someone you love know what's in their water — we'll email them San Marcos's report. No sign-ups, no list.

Reported illness & cancer claims

No claims reported yet. Be the first to add one.

Claims are aggregated from public records and community reports and may be unverified. If you believe your illness is linked to local water, request a consultation.

Self-reported issues

No issues reported yet. Be the first to report one.

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

Get water alerts for San Marcos, TX

We'll email you when a new violation, lawsuit, or health report appears for San Marcos's water. Free, unsubscribe anytime.

Home water filtration system

Protect your home

Improve San Marcos's water

A certified filtration system can remove lead, PFAS, nitrates, and the contaminants flagged on this page. Get a free, no-obligation quote tailored to your home.

What are you interested in?

By submitting you agree to be contacted about water treatment options.

Public water systems

CITY OF SAN MARCOS

PWSID:
TX1050001
Source:
Surface water
Serves:
72,970 people

EPA & DEP violations

CITY OF SAN MARCOS

PWSID TX10500016 violations

  • MCL exceedance — CITY OF SAN MARCOS

    high severityHealth-basedOpen

    EPA SDWIS violation 176 (code 02) at CITY OF SAN MARCOS (PWSID TX1050001).

    EPA SDWIS · MCL exceedance · Began Oct 1, 2025 · 11 months ago · Source ↗

  • Monitoring violation — CITY OF SAN MARCOS

    low severityResolved

    EPA SDWIS violation 149 (code 27) at CITY OF SAN MARCOS (PWSID TX1050001).

    EPA SDWIS · Monitoring violation · Began Feb 1, 2021 · 5 years ago · Source ↗

  • Other violation — CITY OF SAN MARCOS

    low severityResolved

    EPA SDWIS violation 144 (code 75) at CITY OF SAN MARCOS (PWSID TX1050001).

    EPA SDWIS · Other violation · Began May 18, 2016 · 10 years ago · Source ↗

  • MCL exceedance — CITY OF SAN MARCOS

    high severityHealth-basedResolved

    EPA SDWIS violation 143 (code 02) at CITY OF SAN MARCOS (PWSID TX1050001).

    EPA SDWIS · MCL exceedance · Began Jan 1, 2016 · 10 years ago · Source ↗

  • Monitoring violation — CITY OF SAN MARCOS

    low severityResolved

    EPA SDWIS violation 136 (code 66) at CITY OF SAN MARCOS (PWSID TX1050001).

    EPA SDWIS · Monitoring violation · Began Dec 30, 2015 · 10 years ago · Source ↗

  • Other violation — CITY OF SAN MARCOS

    low severityResolved

    EPA SDWIS violation 116 (code 75) at CITY OF SAN MARCOS (PWSID TX1050001).

    EPA SDWIS · Other violation · Began Mar 30, 2014 · 12 years ago · Source ↗

Water-related lawsuits

No lawsuits on record.

In the news & sources

No coverage linked yet.