D & E WATER COMPANY

BLACK HAWK, SD · ~100 people served

Check your exact address → BLACK HAWK overview

100

Excellent

PurityRadar safety score

PWSID

SD4600392

State

South Dakota

City

BLACK HAWK

Population served

100

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 2011. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Oct 2010 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jul 2006 Resolved

Treatment technique · EPA contaminant 0400 health-based began Feb 2006 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2006 Resolved

Monitoring & reporting · EPA contaminant 0999 began Oct 2005 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jul 2005 Resolved

Monitoring & reporting · EPA contaminant 0999 began Apr 2005 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jan 2005 Resolved

Treatment technique · EPA contaminant 0400 health-based began Apr 2004 Resolved

Other · EPA contaminant 7000 began Jul 2001 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2000 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 1996 Resolved

Recent enforcement actions

State action · SOX May 2011
State action · SIF Oct 2010
State action · SIE Oct 2010
State action · SFL Mar 2007
State action · SFL Mar 2007
State action · SFL Mar 2007
State action · SFL Mar 2007
State action · SFL Mar 2007

This profile is built from EPA public records for system SD4600392 — 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.