THRALL MTN. PROPERTY OWNERS ASSOCIAT

BLACK HAWK, SD · ~70 people served

Check your exact address → BLACK HAWK overview

100

Excellent

PurityRadar safety score

PWSID

SD4600513

State

South Dakota

City

BLACK HAWK

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2004. Official EPA record →

Other · EPA contaminant 7000 began Jul 2004 Resolved

Other · EPA contaminant 7000 began Jul 2000 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jun 1996 Resolved

Monitoring & reporting · EPA contaminant 2044 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2040 began Jan 1996 Resolved

Monitoring & reporting · Chlorite began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2041 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2031 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2110 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2326 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2047 began Jan 1996 Resolved

Monitoring & reporting · EPA contaminant 2043 began Jan 1996 Resolved

Recent enforcement actions

State action · SOX Aug 2004
State action · SIA Jul 2004
State action · SOX Jul 2000
State action · SIA Jul 2000
State action · SOX Nov 1999
State action · SIF Oct 1999
State action · SIE Sep 1999
State action · SOX Jan 1997

This profile is built from EPA public records for system SD4600513 — 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.