WaterQ

City Water Quality Rankings in Oregon

180 cities ranked by drinking water quality.

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Popular city water quality comparisons

Gearhart, OR vs Happy Valley, OR Compare → Lakeside, OR vs Mt Hood, OR Compare → Ophir, OR vs Oregon City, OR Compare → Pleasant Hill, OR vs West Linn, OR Compare →

Trending Cities

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#1
Gearhart
County, OR
100 A
#2
Happy Valley
County, OR
100 A
#3
Lakeside
County, OR
100 A
#4
Mt Hood
County, OR
100 A
#5
Ophir
County, OR
100 A
#6
Oregon City
County, OR
100 A
#7
Pleasant Hill
County, OR
100 A
#8
West Linn
County, OR
100 A
#9
Winston
County, OR
100 A
#10
Enterprise
County, OR
99 A
#11
Moro
County, OR
99 A
#12
Sunriver
County, OR
99 A
#13
Burns
County, OR
98 A
#14
Donald
County, OR
98 A
#15
Hubbard
County, OR
98 A
#16
John Day
County, OR
98 A
#17
Junction City
County, OR
98 A
#18
Lincoln City
County, OR
98 A
#19
Redmond
County, OR
98 A
#20
Willamina
County, OR
98 A
#21
Coburg
County, OR
97 A
#22
Cornelius
County, OR
97 A
#23
Cottage Grove
County, OR
97 A
#24
Gleneden Beach
County, OR
97 A

Frequently Asked Questions

How are city water quality rankings calculated in Oregon?

WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.

Can I compare two cities in Oregon?

Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.

How often does WaterQ refresh city data?

City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.

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