Question 1

Is Hays/White Cow Canyon WS water safe to drink?

Accepted Answer

Hays/White Cow Canyon WS (PWS ID: 083090044) has 158 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 840 people using Groundwater sources.

Question 2

How many people does Hays/White Cow Canyon WS serve?

Accepted Answer

EPA SDWIS reports that Hays/White Cow Canyon WS serves 840 people (this public water system's service population, not the municipal population of Harlem or any other city). It is a Native American-owned system using Groundwater water sources with 150 service connections. The operator address is listed in Harlem, EPA Region 8 — Tribal Water Systems.

Question 3

What type of violations does Hays/White Cow Canyon WS have?

Accepted Answer

Hays/White Cow Canyon WS has 158 total violations: 15 health-based violations (MCL exceedances or treatment failures), 140 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Hays/White Cow Canyon WS water?

Accepted Answer

No PFAS testing data is available for Hays/White Cow Canyon WS under the EPA's UCMR5 monitoring program.

Question 5

What water source does Hays/White Cow Canyon WS use?

Accepted Answer

Hays/White Cow Canyon WS uses Groundwater 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

Where does Hays/White Cow Canyon WS sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Hays/White Cow Canyon WS ranks #21,917 of 29,740 by people served, and #41 of 55 in EPA Region 8 — Tribal Water Systems. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Hays/White Cow Canyon WS's violation count compare nationally?

Accepted Answer

Hays/White Cow Canyon WS has 158 recorded EPA SDWIS violations, fewer than 18% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 82% of that cohort has fewer violations than Hays/White Cow Canyon WS. 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	29	2009
Coliform (TCR)	MCL	14	2009
Di(2-ethylhexyl) phthalate	MR	3	2008
Nitrate	MR	2	2008
1,2,4-Trichlorobenzene	MR	2	2008
cis-1,2-Dichloroethylene	MR	2	2008
o-Dichlorobenzene	MR	2	2008
p-Dichlorobenzene	MR	2	2008
1,1-Dichloroethylene	MR	2	2008
1,2-Dichloroethane	MR	2	2008
1,1,1-Trichloroethane	MR	2	2008
Carbon tetrachloride	MR	2	2008
1,2-Dichloropropane	MR	2	2008
Tetrachloroethylene	MR	2	2008
Benzene	MR	2	2008
Toluene	MR	2	2008
Ethylbenzene	MR	2	2008
Styrene	MR	2	2008
Methoxychlor	MR	2	2008
BHC-GAMMA	MR	2	2008
Diquat	MR	2	2008
Endothall	MR	2	2008
Glyphosate	MR	2	2008
Di(2-ethylhexyl) adipate	MR	2	2008
Simazine	MR	2	2008
Dinoseb	MR	2	2008
Hexachlorocyclopentadiene	MR	2	2008
Carbofuran	MR	2	2008
Heptachlor	MR	2	2008
HEXACHLOROBENZENE	MR	2	2008

Hays/White Cow Canyon WS

Hays/White Cow Canyon WS standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Hays/White Cow Canyon WS

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems with smaller service footprints