HERMOSA WATER USERS ASSOCIATION

HERMOSA, SD · ~108 people served

Check your exact address → HERMOSA overview

100

Excellent

PurityRadar safety score

PWSID

SD4602180

State

South Dakota

City

HERMOSA

Population served

108

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2021. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jul 2021 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2020 Resolved

Treatment technique · Lead & Copper Rule health-based began Oct 2019 Resolved

Monitoring · Lead & Copper Rule began Jul 2019 Resolved

Max contaminant level (MCL) · Lead & Copper Rule health-based began Aug 2017 Resolved

Monitoring & reporting · Total coliform began Aug 2013 Resolved

Max contaminant level (MCL) · Total coliform health-based began Apr 2005 Resolved

Other · EPA contaminant 7500 began Nov 2001 Resolved

Monitoring & reporting · Total coliform began Sep 2001 Resolved

Max contaminant level (MCL) · Uranium health-based began Jan 2001 Resolved

Max contaminant level (MCL) · Uranium health-based began Jul 2000 Resolved

Monitoring & reporting · EPA contaminant 2378 began Oct 1999 Resolved

Recent enforcement actions

State action · SOX Dec 2021
State action · SIE Jul 2021
State action · SIE Jul 2021
State action · SOX Dec 2020
State action · SIF Oct 2020
State action · SIE Jul 2020
State action · SOX Oct 2019
State action · SIE Oct 2019

This profile is built from EPA public records for system SD4602180 — 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.