Community Water System · PWS 084690478
Wounded Knee Water System
Operator location Pine Ridge, EPA Region 8 — Tribal Water Systems - smaller served population (≤ 999) at 255 people served; 86 SDWIS violations on record from surface water sources.
- 255
- People served (this PWS)
- 86
- EPA violations (this PWS)
- 17
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Wounded Knee Water System standing, high SDWIS violation third
255 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 20% is middle-third health share (≤ 23%).
The verdict
Wounded Knee Water System sits in the upper third of the sitemap cohort by violation count (86), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (255; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 20% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 86
- Total EPA violations on record
- 20%
- Health-based (MCL / treatment failure)
- 255
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 51
- School/Daycare
- No
- MCL Violations
- 15
- Monitoring Violations
- 59
- Treatment Tech Violations
- 2
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 25 | 2005 |
| Coliform (TCR) | MCL | 15 | 2002 |
| Lead and Copper Rule | MR | 12 | 2022 |
| Consumer Confidence Rule | Other | 9 | 2010 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2025 |
| TTHM | MR | 4 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 2 | 1982 |
| Nitrate | MR | 2 | 1994 |
| Groundwater Rule | TT | 1 | 2019 |
| Revised Total Coliform Rule | MON | 1 | 2019 |
| Asbestos | MR | 1 | 2020 |
| Mercury | MR | 1 | 1983 |
| Cadmium | MR | 1 | 1983 |
| Barium | MR | 1 | 1983 |
| Arsenic | MR | 1 | 1983 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Chromium | MR | 1 | 1983 |
| Fluoride | MR | 1 | 1983 |
| Selenium | MR | 1 | 1983 |
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 1 | 2022 |
Violation Count vs. the National Corpus
Wounded Knee Water System has 86 recorded EPA violations, 70% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 30% carry more. 20% of this system's own violations are health-based (17 of 86), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
86 Around the middle fewer violations than 30% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Population served record for Wounded Knee Water System
EPA SDWIS lists 255 people served and 51 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
86 violations · 255 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Wounded Knee Water System
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in EPA Region 8 — Tribal Water Systems compares on the same EPA violation measures. EPA Region 8 — Tribal Water Systems systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.