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Water system · PWSID SD4602310

OWANKA RURAL WATER SYSTEM

BLACK HAWK, SD · ~52 people served

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

PWSID

SD4602310

State

South Dakota

City

BLACK HAWK

Population served

52

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

20

Violations on record

0

Unaddressed

20

Health-based

78

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2021. Official EPA record →

Max contaminant level (MCL) · Uranium health-based began Oct 2020 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2020 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2020 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2020 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2019 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2019 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2019 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2019 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2018 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2018 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2018 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2018 Resolved

Recent enforcement actions

  • State action · SOX Feb 2021
  • State action · SOX Feb 2021
  • State action · SOX Feb 2021
  • State action · SOX Feb 2021
  • State action · SOX Feb 2021
  • State action · SOX Feb 2021
  • State action · SOX Feb 2021
  • State action · SOX Feb 2021

This profile is built from EPA public records for system SD4602310 — 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.