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Water system · PWSID TX1080010

CITY OF SAN JUAN

SAN JUAN, TX · ~30,000 people served

Check your exact address → SAN JUAN overview
89
Excellent
PurityRadar safety score

PWSID

TX1080010

State

Texas

City

SAN JUAN

Population served

30,000

Primary source

Surface water

Score history

▼ 11 points — the score moved from 100 to 89 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 89

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

PFOS

Perfluorooctanesulfonic acid

4.5 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFHxS

Perfluorohexanesulfonic acid

3.9 ppt

limit 10 ppt

Below EPA limit

Lithium

44,200 ppt

limit —

No federal limit

PFBA

6.1 ppt

limit —

No federal limit

PFPeA

5.6 ppt

limit —

No federal limit

PFHxA

5.1 ppt

limit —

No federal limit

PFHpA

3.5 ppt

limit —

No federal limit

Violations & enforcement

14

Violations on record

0

Unaddressed

4

Health-based

32

Enforcement actions

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

Monitoring & reporting · EPA contaminant 1009 began Sep 2017 Resolved
Other · EPA contaminant 7500 began Feb 2017 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2016 Resolved
Monitoring & reporting · EPA contaminant 0200 began Jul 2016 Resolved
Monitoring & reporting · EPA contaminant 1009 began Aug 2014 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2013 Resolved
Other · EPA contaminant 7500 began Mar 2013 Resolved
Monitoring & reporting · Total coliform began Nov 2012 Resolved
Monitoring & reporting · EPA contaminant 0200 began Dec 2002 Resolved
Monitoring & reporting · EPA contaminant 0200 began Dec 2002 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 1996 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 1996 Resolved

Recent enforcement actions

  • State action · SIF Feb 2019
  • State action · SIA Jan 2018
  • State action · SIE Jan 2018
  • State action · SOX Nov 2017
  • State action · SOX Oct 2017
  • State action · SIF Apr 2017
  • State action · SOX Apr 2017
  • State action · SIA Mar 2017

This profile is built from EPA public records for system TX1080010 — 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.