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Water system · PWSID MT0000241

HELENA WATER SYSTEM

HELENA, MT · ~32,091 people served

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

PWSID

MT0000241

State

Montana

City

HELENA

Population served

32,091

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 May 2024). Levels in parts per trillion (ppt).

Lithium

62,000 ppt

limit —

No federal limit

Violations & enforcement

23

Violations on record

0

Unaddressed

4

Health-based

52

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2023. Official EPA record →

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2023 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2022 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jul 2022 Resolved
Other · EPA contaminant 7000 began Oct 2011 Resolved
Monitoring & reporting · EPA contaminant 1094 began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 0200 began Oct 2008 Resolved
Monitoring & reporting · Total coliform began Sep 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2008 Resolved
Monitoring & reporting · EPA contaminant 0200 began May 2008 Resolved
Monitoring & reporting · EPA contaminant 0200 began May 2008 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2007 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2006 Resolved

Recent enforcement actions

  • State action · SOX May 2023
  • State action · SOX May 2023
  • State action · SOX May 2023
  • State action · SIA Feb 2023
  • State action · SIE Feb 2023
  • State action · SIA Nov 2022
  • State action · SIE Nov 2022
  • State action · SIE Sep 2022

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

Arsenic

2 stations · latest Jun 2021

0.01 · max 0.014 mg/L · 5

Copper

2 stations · latest Jun 2021

0.002 · max 0.005 mg/L · 5

Lead

2 stations · latest Jun 2021

0.0023 · max 0.0024 mg/L · 5

Fluoride

2 stations · latest Jun 2021

0.396 · max 0.758 mg/L · 3

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 MT0000241 — 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.