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Water system · PWSID TX0790332

BIG OAKS MUD

HOUSTON, TX · ~6,450 people served

Check your exact address → HOUSTON overview
90
Excellent
PurityRadar safety score

PWSID

TX0790332

State

Texas

City

HOUSTON

Population served

6,450

Primary source

SWP

Score history

▼ 10 points — the score moved from 100 to 90 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 90

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 Oct 2023). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

4.3 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFHxS

Perfluorohexanesulfonic acid

3.2 ppt

limit 10 ppt

Below EPA limit

Lithium

10,200 ppt

limit —

No federal limit

PFBA

5.6 ppt

limit —

No federal limit

PFBS

3.3 ppt

limit —

No federal limit

PFHxA

3.2 ppt

limit —

No federal limit

PFPeA

3.1 ppt

limit —

No federal limit

Violations & enforcement

4

Violations on record

1

Unaddressed

0

Health-based

3

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2014. Official EPA record →

Other · EPA contaminant 7000 began Jul 2025 Unaddressed
Monitoring & reporting · Lead & Copper Rule began Dec 2013 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2013 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2011 Resolved

Recent enforcement actions

  • State action · SOX Aug 2014
  • State action · SOX Aug 2014
  • State action · SIF Nov 2011

This profile is built from EPA public records for system TX0790332 — 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.