NORTHDALE SANITARY DISTRICT

PIEDMONT, SD · ~1,075 people served

Check your exact address → PIEDMONT overview

100

Excellent

PurityRadar safety score

PWSID

SD4600514

State

South Dakota

City

PIEDMONT

Population served

1,075

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 Jul 2024. Official EPA record →

Treatment technique · EPA contaminant 0400 health-based began Feb 2024 Resolved

Monitoring & reporting · Arsenic began Jul 2018 Resolved

Treatment technique · EPA contaminant 0400 health-based began Feb 2015 Resolved

Recent enforcement actions

State action · SOX Jul 2024
State action · SIA Feb 2024
State action · SIF Nov 2018
State action · SOX Oct 2018
State action · SIE Oct 2018
State action · SOX Mar 2015
State action · SIA Mar 2014
State action · SO8 Sep 1989

This profile is built from EPA public records for system SD4600514 — 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.