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Water system · PWSID SD4602151

OAK MOUNTAIN COUNTRY ESTATES

BLACK HAWK, SD · ~85 people served

Check your exact address → BLACK HAWK overview
100
Excellent
PurityRadar safety score

PWSID

SD4602151

State

South Dakota

City

BLACK HAWK

Population served

85

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

120

Violations on record

0

Unaddressed

45

Health-based

200

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2017. Official EPA record →

Max contaminant level (MCL) · Gross alpha health-based began Jul 2017 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Apr 2017 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2017 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jan 2017 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2017 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Oct 2016 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2016 Resolved
Treatment technique · EPA contaminant 0400 health-based began Aug 2016 Resolved
Monitoring · Lead & Copper Rule began Aug 2016 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jul 2016 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2016 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2016 Resolved

Recent enforcement actions

  • State action · SOX Dec 2017
  • State action · SOX Dec 2017
  • State action · SOX Dec 2017
  • State action · SOX Dec 2017
  • State action · SOX Dec 2017
  • State action · SOX Dec 2017
  • State action · SOX Dec 2017
  • State action · SOX Dec 2017

This profile is built from EPA public records for system SD4602151 — 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.