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Water system · PWSID SD4600263

COLONIAL PINE HILLS SANITARY DISTRIC

RAPID CITY, SD · ~1,200 people served

Check your exact address → RAPID CITY overview
100
Excellent
PurityRadar safety score

PWSID

SD4600263

State

South Dakota

City

RAPID CITY

Population served

1,200

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

20

Violations on record

0

Unaddressed

19

Health-based

75

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2011. Official EPA record →

Max contaminant level (MCL) · Uranium health-based began Apr 2010 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2010 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2009 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2009 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Jul 2009 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2009 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Apr 2009 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2009 Resolved
Max contaminant level (MCL) · Uranium health-based began Oct 2008 Resolved
Max contaminant level (MCL) · Uranium health-based began Jul 2008 Resolved
Max contaminant level (MCL) · Uranium health-based began Apr 2008 Resolved
Max contaminant level (MCL) · Uranium health-based began Jan 2008 Resolved

Recent enforcement actions

  • State action · SOX Apr 2011
  • State action · SOX Apr 2011
  • State action · SOX Apr 2011
  • State action · SOX Apr 2011
  • State action · SOX Apr 2011
  • State action · SOX Apr 2011
  • State action · SOX Apr 2011
  • State action · SOX Apr 2011

This profile is built from EPA public records for system SD4600263 — 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.