HUMBOLDT

HUMBOLDT, SD · ~579 people served

Check your exact address → HUMBOLDT overview

100

Excellent

PurityRadar safety score

PWSID

SD4600167

State

South Dakota

City

HUMBOLDT

Population served

579

Primary source

GWP

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 2017. Official EPA record →

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

Treatment technique · EPA contaminant 0400 health-based began Feb 2016 Resolved

Monitoring & reporting · Total coliform began Jun 2014 Resolved

Monitoring & reporting · EPA contaminant 0999 began Apr 2014 Resolved

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

Monitoring & reporting · EPA contaminant 0999 began Jul 2012 Resolved

Monitoring & reporting · Total coliform began Jul 2012 Resolved

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

Other · EPA contaminant 7000 began Jul 2003 Resolved

Monitoring & reporting · Total coliform began Sep 2001 Resolved

Max contaminant level (MCL) · Total coliform health-based began Sep 1997 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 1996 Resolved

Recent enforcement actions

State action · SOX Jul 2017
State action · SIA Apr 2017
State action · SOX Dec 2016
State action · SIA Mar 2016
State action · SOX Sep 2014
State action · SIF Aug 2014
State action · SOX Aug 2014
State action · SIE Jul 2014

This profile is built from EPA public records for system SD4600167 — 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.