Question 1

Is Wounded Knee District School water safe to drink?

Accepted Answer

Wounded Knee District School (PWS ID: 084690467) has 153 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 280 people using Surface Water sources.

Question 2

How many people does Wounded Knee District School serve?

Accepted Answer

EPA SDWIS reports that Wounded Knee District School serves 280 people (this public water system's service population, not the municipal population of Manderson or any other city). It is a Federal-owned system using Surface Water water sources with 30 service connections. The operator address is listed in Manderson, EPA Region 8 — Tribal Water Systems.

Question 3

What type of violations does Wounded Knee District School have?

Accepted Answer

Wounded Knee District School has 153 total violations: 13 health-based violations (MCL exceedances or treatment failures), 136 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Wounded Knee District School water?

Accepted Answer

No PFAS testing data is available for Wounded Knee District School under the EPA's UCMR5 monitoring program.

Question 5

What water source does Wounded Knee District School use?

Accepted Answer

Wounded Knee District School uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Question 6

Where does this data come from?

Accepted Answer

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Question 7

How does Wounded Knee District School's violation count compare nationally?

Accepted Answer

Wounded Knee District School has 153 recorded EPA SDWIS violations, fewer than 19% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 81% of that cohort has fewer violations than Wounded Knee District School. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

Contaminant	Category	Count	Latest
Coliform (TCR)	MR	24	2015
Lead and Copper Rule	MR	10	2024
Coliform (TCR)	MCL	10	2011
Chlorine	MR	5	2009
Nitrate	MR	4	2010
TTHM	MR	4	2025
Total Haloacetic Acids (HAA5)	MR	4	2025
1,2,4-Trichlorobenzene	MR	2	2008
cis-1,2-Dichloroethylene	MR	2	2008
Xylenes, Total	MR	2	2008
DICHLOROMETHANE	MR	2	2008
o-Dichlorobenzene	MR	2	2008
p-Dichlorobenzene	MR	2	2008
trans-1,2-Dichloroethylene	MR	2	2008
1,1,1-Trichloroethane	MR	2	2008
Carbon tetrachloride	MR	2	2008
1,1,2-Trichloroethane	MR	2	2008
CHLOROBENZENE	MR	2	2008
Benzene	MR	2	2008
Toluene	MR	2	2008
Ethylbenzene	MR	2	2008
Revised Total Coliform Rule	MON	2	2022
Gross Alpha, Excl. Radon and U	MR	2	1982
Surface Water Treatment Rule	MR	2	2023
Tetrachloroethylene	MR	2	2008
1,2-Dichloroethane	MR	2	2008
Consumer Confidence Rule	Other	2	2007
Trichloroethylene	MR	2	2008
Styrene	MR	2	2008
Vinyl chloride	MR	2	2008

Wounded Knee District School

Wounded Knee District School standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Wounded Knee District School

Nationwide peers

Cross-state systems with comparable violation load