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Water system · PWSID TX1010013

CITY OF HOUSTON

HOUSTON, TX · ~2,970,543 people served

Check your exact address → HOUSTON overview
100
Excellent
PurityRadar safety score

PWSID

TX1010013

State

Texas

City

HOUSTON

Population served

2,970,543

Primary source

Surface water

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

Lithium

32,400 ppt

limit —

No federal limit

6:2 FTS

8.5 ppt

limit —

No federal limit

PFBA

5.8 ppt

limit —

No federal limit

PFHxA

4.1 ppt

limit —

No federal limit

PFPeA

3.3 ppt

limit —

No federal limit

Violations & enforcement

7

Violations on record

0

Unaddressed

3

Health-based

26

Enforcement actions

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

Treatment technique · EPA contaminant 0300 health-based began May 2025 Resolved
Monitoring · Lead & Copper Rule began Dec 2019 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2015 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 2015 Resolved
Monitoring & reporting · EPA contaminant 0300 began Aug 2005 Resolved
Monitoring & reporting · EPA contaminant 0300 began Dec 2002 Resolved

Recent enforcement actions

  • State action · SOX Jul 2025
  • State action · SIA Jun 2025
  • State action · SIF Jun 2025
  • State action · SIE May 2025
  • State action · SIF Jun 2020
  • State action · SOX Feb 2020
  • State action · SIA Feb 2020
  • State action · SIE Feb 2020

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

Fluoride

18 stations · latest Nov 2025

0.32 · max 1.23 mg/L · 109

Copper

7 stations · latest Nov 2022

3 · max 4.7 ug/l · 82

Lead

7 stations · latest Nov 2022

0.193 · max 0.538 ug/l · 78

Manganese

2 stations · latest Mar 2025

78.3 · max 119 ug/L · 13

Arsenic

1 station · latest Sep 2022

2.56 · max 2.56 ug/L · 1

Nitrate

1 station · latest Jun 2023

2.57 · max 2.57 mg/L · 1

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 TX1010013 — 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.