LOCKWOOD WATER AND SEWER DISTRICT

BILLINGS, MT · ~5,900 people served

Check your exact address → BILLINGS overview

100

Excellent

PurityRadar safety score

PWSID

MT0000156

State

Montana

City

BILLINGS

Population served

5,900

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

Lithium

35,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2013. Official EPA record →

Other · EPA contaminant 7000 began Jul 2013 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2004 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2004 Resolved

Recent enforcement actions

State action · SOX Jul 2013
State action · SIA Jul 2013
State action · SOX Jul 2009
EPA/federal action · EOX Jul 2009
State action · SOX Apr 2006
State action · SIA Feb 2005
State action · SIE Feb 2005
State action · SIA Sep 1985

This profile is built from EPA public records for system MT0000156 — 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.