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Water system · PWSID SD4600229

OACOMA

OACOMA, SD · ~386 people served

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

PWSID

SD4600229

State

South Dakota

City

OACOMA

Population served

386

Primary source

Surface water

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

13

Violations on record

0

Unaddressed

10

Health-based

44

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Aug 2015. Official EPA record →

Other began Jun 2014 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2013 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2013 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2012 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2012 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jul 2012 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Apr 2012 Resolved
Treatment technique · Bromate health-based began Apr 2012 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2012 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2012 Resolved
Other began Jun 2011 Resolved
Treatment technique · Bromate health-based began Oct 2004 Resolved

Recent enforcement actions

  • State action · SOX Aug 2015
  • State action · SO6 Feb 2015
  • State action · SOX Dec 2013
  • State action · SOX Dec 2013
  • State action · SOX Dec 2013
  • State action · SOX Dec 2013
  • State action · SOX Dec 2013
  • State action · SOX Dec 2013

This profile is built from EPA public records for system SD4600229 — 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.