BLACK DIAMOND WATER DEPT

BLACK DIAMOND, WA · ~6,407 people served

Check your exact address → BLACK DIAMOND overview

100

Excellent

PurityRadar safety score

PWSID

WA5307220

State

Washington

City

BLACK DIAMOND

Population served

6,407

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

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Other · EPA contaminant 7000 began Jul 2017 Resolved

Other · EPA contaminant 7000 began Jul 2016 Resolved

Monitoring & reporting · EPA contaminant 2032 began Oct 2007 Resolved

Monitoring & reporting · EPA contaminant 2067 began Oct 2007 Resolved

Monitoring & reporting · Nitrate began Jan 2006 Resolved

Monitoring & reporting · Nitrate began Jan 2005 Resolved

Monitoring & reporting · Nitrate began Jan 2004 Resolved

Monitoring & reporting · Nitrate began Jan 2003 Resolved

Recent enforcement actions

State action · SOX May 2023
State action · SOX Feb 2018
State action · SOX Nov 2016
State action · SOX Jan 2008
State action · SOX Jan 2008
State action · SOX Jan 2008
State action · SOX Jan 2008
State action · SOX Jan 2008

This profile is built from EPA public records for system WA5307220 — 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.