Question 1

Is Dufur, City Of water safe to drink?

Accepted Answer

Dufur, City Of (PWS ID: OR4100261) has 144 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 610 people using Groundwater sources.

Question 2

How many people does Dufur, City Of serve?

Accepted Answer

EPA SDWIS reports that Dufur, City Of serves 610 people (this public water system's service population, not the municipal population of Dufur or any other city). It is a Local-owned system using Groundwater water sources with 351 service connections. The operator address is listed in Dufur, Oregon.

Question 3

What type of violations does Dufur, City Of have?

Accepted Answer

Dufur, City Of has 144 total violations: 3 health-based violations (MCL exceedances or treatment failures), 133 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 Dufur, City Of water?

Accepted Answer

No PFAS testing data is available for Dufur, City Of under the EPA's UCMR5 monitoring program.

Question 5

What water source does Dufur, City Of use?

Accepted Answer

Dufur, City Of 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 Dufur, City Of sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Dufur, City Of ranks #25,961 of 29,740 by people served, and #319 of 373 in Oregon. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Dufur, City Of's violation count compare nationally?

Accepted Answer

Dufur, City Of has 144 recorded EPA SDWIS violations, fewer than 20% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 80% of that cohort has fewer violations than Dufur, City Of. 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	10	2016
Revised Total Coliform Rule	MON	5	2023
Consumer Confidence Rule	Other	5	2025
Nitrate	MR	3	2019
Revised Total Coliform Rule	MCL	3	2021
1,2,4-Trichlorobenzene	MR	2	2008
o-Dichlorobenzene	MR	2	2008
p-Dichlorobenzene	MR	2	2008
Vinyl chloride	MR	2	2008
1,1-Dichloroethylene	MR	2	2008
trans-1,2-Dichloroethylene	MR	2	2008
1,1,1-Trichloroethane	MR	2	2008
Carbon tetrachloride	MR	2	2008
1,2-Dichloropropane	MR	2	2008
1,1,2-Trichloroethane	MR	2	2008
CHLOROBENZENE	MR	2	2008
Toluene	MR	2	2008
Ethylbenzene	MR	2	2008
Styrene	MR	2	2008
Endrin	MR	2	2008
Methoxychlor	MR	2	2008
Toxaphene	MR	2	2008
Dalapon	MR	2	2008
Diquat	MR	2	2008
Di(2-ethylhexyl) adipate	MR	2	2008
Di(2-ethylhexyl) phthalate	MR	2	2008
Dinoseb	MR	2	2008
Hexachlorocyclopentadiene	MR	2	2008
Atrazine	MR	2	2008
LASSO	MR	2	2008

Dufur, City Of

Dufur, City Of standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Dufur, City Of

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems with smaller service footprints