SHERIDAN LAKE HIGHLANDS, INC.

PIEDMONT, SD · ~85 people served

Check your exact address → PIEDMONT overview

100

Excellent

PurityRadar safety score

PWSID

SD4602285

State

South Dakota

City

PIEDMONT

Population served

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 Nov 2020. Official EPA record →

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2020 Resolved

Treatment technique · EPA contaminant 0700 health-based began Dec 2019 Resolved

Treatment technique · EPA contaminant 0700 health-based began Nov 2019 Resolved

Treatment technique · EPA contaminant 0400 health-based began Jun 2017 Resolved

Treatment technique · EPA contaminant 0700 health-based began Oct 2014 Resolved

Treatment technique · EPA contaminant 0400 health-based began May 2013 Resolved

Monitoring & reporting · Total coliform began Aug 2012 Resolved

Monitoring & reporting · EPA contaminant 0999 began Jul 2012 Resolved

Treatment technique · EPA contaminant 0400 health-based began Jun 2012 Resolved

Treatment technique · EPA contaminant 0400 health-based began Apr 2010 Resolved

Treatment technique · Lead & Copper Rule health-based began Sep 2009 Resolved

Monitoring & reporting · Total coliform began Jun 2009 Resolved

Recent enforcement actions

State action · SOX Nov 2020
State action · SIF Jun 2020
State action · SIE Jun 2020
State action · SIF Dec 2019
State action · SIF Dec 2019
State action · SO6 Dec 2019
State action · SOX Dec 2019
State action · SOX Dec 2019

This profile is built from EPA public records for system SD4602285 — 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.