NORTH SIOUX CITY

NORTH SIOUX CITY, SD · ~3,042 people served

Check your exact address → NORTH SIOUX CITY overview

100

Excellent

PurityRadar safety score

PWSID

SD4600226

State

South Dakota

City

NORTH SIOUX CITY

Population served

3,042

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 May 2008. Official EPA record →

Monitoring & reporting · EPA contaminant 2931 began Jan 2008 Resolved

Monitoring & reporting · EPA contaminant 2946 began Jan 2008 Resolved

Other · EPA contaminant 7000 began Jul 2003 Resolved

Other · EPA contaminant 7000 began Jul 2000 Resolved

Monitoring & reporting · EPA contaminant 2380 began Jan 1999 Resolved

Monitoring & reporting · EPA contaminant 2992 began Jan 1999 Resolved

Monitoring & reporting · EPA contaminant 2964 began Jan 1999 Resolved

Monitoring & reporting · EPA contaminant 2981 began Jan 1999 Resolved

Monitoring & reporting · EPA contaminant 2976 began Jan 1999 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 1999 Resolved

Monitoring & reporting · EPA contaminant 2987 began Jan 1999 Resolved

Monitoring & reporting · EPA contaminant 2378 began Jan 1999 Resolved

Recent enforcement actions

State action · SOX May 2008
State action · SOX May 2008
State action · SIE Apr 2008
State action · SIE Apr 2008
State action · SOX Jul 2003
State action · SO6 Jul 2003
State action · SOX Sep 2000
State action · SOX Sep 2000

This profile is built from EPA public records for system SD4600226 — 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.