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Water system · PWSID SD4600233

ONIDA

ONIDA, SD · ~658 people served

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

PWSID

SD4600233

State

South Dakota

City

ONIDA

Population served

658

Primary source

SWP

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

34

Violations on record

0

Unaddressed

15

Health-based

71

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2008. Official EPA record →

Other · EPA contaminant 7500 began Aug 2004 Resolved
Monitoring & reporting · Total coliform began Jul 2003 Resolved
Other · EPA contaminant 7000 began Jul 2002 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2000 Resolved
Other · EPA contaminant 7000 began Jul 2000 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 1999 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 1997 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
Max contaminant level (MCL) · Total coliform health-based began Jul 1997 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 1997 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 1996 Resolved

Recent enforcement actions

  • State action · SIF Jul 2008
  • State action · SOX Jul 2008
  • State action · SFG Sep 2004
  • State action · SOX Feb 2004
  • State action · SIE Aug 2003
  • State action · SOX Aug 2002
  • State action · SIA Aug 2002
  • State action · SOX Sep 2001

This profile is built from EPA public records for system SD4600233 — 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.