WOUNDED KNEE WATER SYSTEM

PINE RIDGE, SD · ~255 people served

Check your exact address → PINE RIDGE overview

100

Excellent

PurityRadar safety score

PWSID

084690478

State

South Dakota

City

PINE RIDGE

Population served

255

Primary source

SWP

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 Oct 2025. Official EPA record →

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2025 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2025 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2024 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2024 Resolved

Monitoring & reporting · Lead & Copper Rule began Sep 2022 Resolved

Treatment technique · EPA contaminant 0800 health-based began Sep 2022 Resolved

Treatment technique · EPA contaminant 0700 health-based began Mar 2019 Resolved

Monitoring · Lead & Copper Rule began Mar 2019 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Sep 2018 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Sep 2018 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 2016 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2014 Resolved

Recent enforcement actions

State action · SOX Oct 2025
State action · SOX Sep 2025
State action · SOX Aug 2025
State action · SOX Oct 2023
State action · SOX Oct 2022
State action · SOX Sep 2020
State action · SOX Apr 2019
State action · SOX Aug 2018

This profile is built from EPA public records for system 084690478 — 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.