HARRIS COUNTY IMPROVEMENT DISTRICT 18

HOUSTON, TX · ~5,025 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1013479

State

Texas

City

HOUSTON

Population served

5,025

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

Lithium

43,300 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Other · EPA contaminant 7000 began Jul 2025 Unaddressed

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

Recent enforcement actions

State action · SIA Dec 2025
State action · SOX Dec 2016
State action · SIF Sep 2016
State action · SIE Aug 2016
State action · SIA Aug 2016

This profile is built from EPA public records for system TX1013479 — 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.