RIMROCK RIDGE WATER ASSOCIATION

RAPID CITY, SD · ~35 people served

Check your exact address → RAPID CITY overview

100

Excellent

PurityRadar safety score

PWSID

SD4602084

State

South Dakota

City

RAPID CITY

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 Mar 1996. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Aug 1995 Resolved

Monitoring & reporting · Nitrate began Jan 1995 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 1994 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jun 1993 Resolved

Monitoring & reporting · EPA contaminant 2985 began Jan 1993 Resolved

Monitoring & reporting · EPA contaminant 2378 began Jan 1993 Resolved

Monitoring & reporting · EPA contaminant 2955 began Jan 1993 Resolved

Monitoring & reporting · EPA contaminant 2992 began Jan 1993 Resolved

Monitoring & reporting · EPA contaminant 2987 began Jan 1993 Resolved

Monitoring & reporting · EPA contaminant 2964 began Jan 1993 Resolved

Monitoring & reporting · EPA contaminant 2976 began Jan 1993 Resolved

Recent enforcement actions

State action · SOX Mar 1996
State action · SOX Feb 1996
State action · SIF Aug 1995
State action · SIE Aug 1995
State action · SOX Feb 1995
State action · SIF Aug 1994
State action · SFG Aug 1994
State action · SIE Aug 1994

This profile is built from EPA public records for system SD4602084 — 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.