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Water system · PWSID SD4600287

SAINT ONGE SEWER & WATER CO

SPEARFISH, SD · ~255 people served

Check your exact address → SPEARFISH overview
100
Excellent
PurityRadar safety score

PWSID

SD4600287

State

South Dakota

City

SPEARFISH

Population served

255

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

66

Violations on record

0

Unaddressed

8

Health-based

39

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2006. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Jul 2006 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2006 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2004 Resolved
Other · EPA contaminant 7000 began Jul 2004 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2001 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2001 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2000 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1997 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 1997 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1995 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 1995 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 1994 Resolved

Recent enforcement actions

  • State action · SOX Aug 2006
  • State action · SOX Aug 2006
  • State action · SIF Jul 2006
  • State action · SIE Jul 2006
  • State action · SIF Jun 2006
  • State action · SIE Jun 2006
  • State action · SOX Apr 2005
  • State action · SIF Sep 2004

This profile is built from EPA public records for system SD4600287 — 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.