CLARK

CLARK, SD · ~1,148 people served

Check your exact address → CLARK overview

100

Excellent

PurityRadar safety score

PWSID

SD4600091

State

South Dakota

City

CLARK

Population served

1,148

Primary source

GWP

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 May 2016. Official EPA record →

Treatment technique · EPA contaminant 0400 health-based began Feb 2016 Resolved

Monitoring & reporting · Total coliform began Sep 2000 Resolved

Other · EPA contaminant 7000 began Jul 2000 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 1997 Resolved

Recent enforcement actions

State action · SOX May 2016
State action · SIA Mar 2016
State action · SOX Apr 2001
State action · SFG Dec 2000
State action · SIE Oct 2000
State action · SOX Jul 2000
State action · SIA Jul 2000
State action · SOX Oct 1997

This profile is built from EPA public records for system SD4600091 — 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.