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Water system · PWSID TX0150018

SAN ANTONIO WATER SYSTEM

SAN ANTONIO, TX · ~2,113,151 people served

Check your exact address → SAN ANTONIO overview
100
Excellent
PurityRadar safety score

PWSID

TX0150018

State

Texas

City

SAN ANTONIO

Population served

2,113,151

Primary source

SWP

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 May 2025). Levels in parts per trillion (ppt).

Lithium

13,100 ppt

limit —

No federal limit

PFBA

6 ppt

limit —

No federal limit

PFBS

3.8 ppt

limit —

No federal limit

PFPeA

3.2 ppt

limit —

No federal limit

Violations & enforcement

22

Violations on record

0

Unaddressed

1

Health-based

22

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2025. Official EPA record →

Other · EPA contaminant 7500 began Jun 2016 Resolved
Monitoring & reporting · Total coliform began Feb 2016 Resolved
Other · EPA contaminant 7500 began Apr 2013 Resolved
Monitoring & reporting · EPA contaminant 3014 began Sep 2012 Resolved
Monitoring & reporting · Nitrate began Jan 2010 Resolved
Monitoring & reporting · EPA contaminant 2035 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2037 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2039 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2050 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2051 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2065 began Jan 2008 Resolved
Monitoring & reporting · EPA contaminant 2067 began Jan 2008 Resolved

Recent enforcement actions

  • State action · SIF May 2025
  • State action · SIE May 2025
  • State action · SIF Dec 2021
  • State action · SIE Dec 2021
  • State action · SIF Jun 2017
  • State action · SIA Dec 2016
  • State action · SOX Aug 2016
  • State action · SIE Jun 2016

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

10 stations · latest Dec 2025

2.36 · max 12.4 mg/L · 297

Fluoride

9 stations · latest Jul 2023

0.13 · max 1.26 mg/l · 75

Atrazine

10 stations · latest Jan 2024

7.09 · max 613 ng/l · 64

Manganese

2 stations · latest Aug 2020

24.7 · max 55.4 ug/L · 5

Copper

2 stations · latest Aug 2020

0.71 · max 1.19 ug/L · 4

Lead

2 stations · latest Aug 2020

0.16 · max 0.23 ug/L · 2

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system TX0150018 — 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.