BLACK MOUNTAIN WATER DISTRICT

HERMISTON, OR · ~43 people served

Check your exact address → HERMISTON overview

100

Excellent

PurityRadar safety score

PWSID

OR4100370

State

Oregon

City

HERMISTON

Population served

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

167

Violations on record

Unaddressed

Health-based

142

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2024. Official EPA record →

Monitoring · Lead & Copper Rule began Nov 2024 Resolved

Monitoring · Lead & Copper Rule began Sep 2023 Resolved

Other · EPA contaminant 7000 began Jul 2023 Resolved

Monitoring & reporting · EPA contaminant 3028 began Jan 2021 Resolved

Monitoring & reporting · EPA contaminant 3014 began Oct 2017 Resolved

Other · EPA contaminant 7500 began Sep 2017 Resolved

Monitoring & reporting · EPA contaminant 3014 began May 2017 Resolved

Monitoring & reporting · Nitrite began Jan 2017 Resolved

Monitoring & reporting · Cyanide began Jan 2017 Resolved

Monitoring & reporting · Fluoride began Jan 2017 Resolved

Recent enforcement actions

State action · SOX Dec 2024
State action · SOX Nov 2023
State action · SOX Jul 2023
State action · SOX Feb 2022
State action · SOX Mar 2020
State action · SOX Feb 2020
State action · SOX Dec 2019
State action · SOX Oct 2019

This profile is built from EPA public records for system OR4100370 — 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.