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Water system · PWSID SD4600220

MOUNT VERNON

MOUNT VERNON, SD · ~461 people served

Check your exact address → MOUNT VERNON overview
100
Excellent
PurityRadar safety score

PWSID

SD4600220

State

South Dakota

City

MOUNT VERNON

Population served

461

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

10

Violations on record

0

Unaddressed

6

Health-based

25

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2020. Official EPA record →

Treatment technique · EPA contaminant 0400 health-based began Feb 2020 Resolved
Monitoring & reporting · Total coliform began Aug 1996 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 1995 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 1995 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 1995 Resolved
Monitoring & reporting · Total coliform began Jul 1995 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 1995 Resolved
Monitoring & reporting · Total coliform began Jun 1995 Resolved
Monitoring & reporting · Total coliform began Jul 1994 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 1994 Resolved

Recent enforcement actions

  • State action · SOX May 2020
  • State action · SIA Apr 2020
  • State action · SOX Oct 1996
  • State action · SIF Oct 1996
  • State action · SIE Sep 1996
  • State action · SIF Oct 1995
  • State action · SIE Sep 1995
  • State action · SIF Aug 1995

This profile is built from EPA public records for system SD4600220 — 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.