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Water system · PWSID MT0000014

BASIN COUNTY WATER AND SEWER DIST

BASIN, MT · ~200 people served

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

PWSID

MT0000014

State

Montana

City

BASIN

Population served

200

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

135

Violations on record

0

Unaddressed

6

Health-based

197

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Oct 2023 Resolved
Other · EPA contaminant 7000 began Jul 2023 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2023 Resolved
Monitoring & reporting · Lead & Copper Rule began Sep 2022 Resolved
Other · EPA contaminant 7000 began Jul 2022 Resolved
Monitoring & reporting · Lead & Copper Rule began Apr 2022 Resolved
Treatment technique · Lead & Copper Rule health-based began Feb 2021 Resolved
Monitoring & reporting · Thallium began Jan 2021 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Oct 2017 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Oct 2017 Resolved
Monitoring & reporting · Lead & Copper Rule began Sep 2015 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2014 Addressed

Recent enforcement actions

  • State action · SOX Mar 2025
  • State action · SOX Feb 2024
  • State action · SOX Feb 2024
  • State action · SOX Feb 2024
  • State action · SIA Nov 2023
  • State action · SOX Nov 2023
  • State action · SIE Jul 2023
  • State action · SIA Jul 2023

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 Jan 2020

2.2 · max 3 ug/l · 4

Copper

2 stations · latest Jan 2020

2 · max 4.2 ug/l · 4

Lead

2 stations · latest Jan 2020

0.096 · max 0.24 ug/l · 4

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 MT0000014 — 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.