TEXAS STATE UNIVERSITY - SAN MARCOS

SAN MARCOS, TX · ~43,552 people served

Check your exact address → SAN MARCOS overview

100

Excellent

PurityRadar safety score

PWSID

TX1050003

State

Texas

City

SAN MARCOS

Population served

43,552

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Apr 2025). Levels in parts per trillion (ppt).

Lithium

9,500 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2019. Official EPA record →

Monitoring · Lead & Copper Rule began Jan 2018 Resolved

Monitoring · Lead & Copper Rule began Dec 2017 Resolved

Monitoring & reporting · Lead & Copper Rule began Sep 2016 Resolved

Monitoring & reporting · Lead & Copper Rule began Sep 2015 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2015 Resolved

Treatment technique · Lead & Copper Rule health-based began Apr 2015 Resolved

Other · EPA contaminant 7500 began Apr 2015 Resolved

Other · EPA contaminant 7500 began Jan 2015 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2015 Resolved

Other · EPA contaminant 7500 began Jan 2015 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2015 Resolved

Recent enforcement actions

State action · SOX Jan 2019
State action · SOX May 2018
State action · SOX May 2018
State action · SIF Apr 2018
State action · SIF Apr 2018
State action · SIA Apr 2018
State action · SIE Apr 2018
State action · SIE Feb 2018

This profile is built from EPA public records for system TX1050003 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.