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Water system · PWSID SD4600154

HERMOSA-OLD SYSTEM

HERMOSA, SD · ~420 people served

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

PWSID

SD4600154

State

South Dakota

City

HERMOSA

Population served

420

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

9

Violations on record

0

Unaddressed

1

Health-based

30

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2025. Official EPA record →

Monitoring · Lead & Copper Rule began Apr 2025 Resolved
Monitoring & reporting · Gross alpha began Oct 2021 Resolved
Monitoring & reporting · Combined radium-226/228 began Oct 2021 Resolved
Monitoring & reporting · Uranium began Oct 2021 Resolved
Treatment technique · EPA contaminant 0400 health-based began Feb 2010 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jan 2006 Resolved
Monitoring & reporting · EPA contaminant 0999 began Oct 2005 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2005 Resolved
Other · EPA contaminant 7000 began Jul 2004 Resolved

Recent enforcement actions

  • State action · SOX Jun 2025
  • State action · SIE Apr 2025
  • State action · SOX Jul 2022
  • State action · SOX Jul 2022
  • State action · SOX Jul 2022
  • State action · SIE Jan 2022
  • State action · SIE Jan 2022
  • State action · SIE Jan 2022

This profile is built from EPA public records for system SD4600154 — 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.