Question 1

Is Wallowa Lake Co Service Dist water safe to drink?

Accepted Answer

Wallowa Lake Co Service Dist (PWS ID: OR4101420) has 124 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 350 people using Groundwater sources.

Question 2

How many people does Wallowa Lake Co Service Dist serve?

Accepted Answer

EPA SDWIS reports that Wallowa Lake Co Service Dist serves 350 people (this public water system's service population, not the municipal population of Enterprise or any other city). It is a Local-owned system using Groundwater water sources with 288 service connections. The operator address is listed in Enterprise, Oregon.

Question 3

What type of violations does Wallowa Lake Co Service Dist have?

Accepted Answer

Wallowa Lake Co Service Dist has 124 total violations: 5 health-based violations (MCL exceedances or treatment failures), 116 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Wallowa Lake Co Service Dist water?

Accepted Answer

No PFAS testing data is available for Wallowa Lake Co Service Dist under the EPA's UCMR5 monitoring program.

Question 5

What water source does Wallowa Lake Co Service Dist use?

Accepted Answer

Wallowa Lake Co Service Dist 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

How does Wallowa Lake Co Service Dist's violation count compare nationally?

Accepted Answer

Wallowa Lake Co Service Dist has 124 recorded EPA SDWIS violations, fewer than 22% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 77% of that cohort has fewer violations than Wallowa Lake Co Service Dist. 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	15	2011
Nitrate	MR	12	2023
Lead and Copper Rule	MR	9	2023
Combined Radium (-226 and -228)	MR	7	2018
Revised Total Coliform Rule	MON	6	2025
Gross Alpha, Excl. Radon and U	MR	5	2016
Coliform (TCR)	MCL	5	1998
Nitrite	MR	4	2002
Combined Uranium	MR	3	2016
cis-1,2-Dichloroethylene	MR	2	2002
DICHLOROMETHANE	MR	2	2002
Vinyl chloride	MR	2	2002
1,1-Dichloroethylene	MR	2	2002
trans-1,2-Dichloroethylene	MR	2	2002
1,2-Dichloroethane	MR	2	2002
1,1,1-Trichloroethane	MR	2	2002
1,2-Dichloropropane	MR	2	2002
1,1,2-Trichloroethane	MR	2	2002
Tetrachloroethylene	MR	2	2002
CHLOROBENZENE	MR	2	2002
Benzene	MR	2	2002
Ethylbenzene	MR	2	2002
E. COLI	MR	2	2017
p-Dichlorobenzene	MR	2	2002
Carbon tetrachloride	MR	2	2002
1,2,4-Trichlorobenzene	MR	2	2002
o-Dichlorobenzene	MR	2	2002
Trichloroethylene	MR	2	2002
Xylenes, Total	MR	2	2002
Toluene	MR	2	2002

Wallowa Lake Co Service Dist

Wallowa Lake Co Service Dist standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Wallowa Lake Co Service Dist

Nationwide peers

Cross-state systems with comparable violation load