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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#97
Grants Pass
County, OR
90 A
#98
Rockaway Beach
County, OR
90 A
#99
Roseburg
County, OR
90 A
#100
Union
County, OR
90 A
#101
Athena
County, OR
89 B
#102
Glide
County, OR
89 B
#103
Gresham
County, OR
89 B
#104
Irrigon
County, OR
89 B
#105
Lebanon
County, OR
89 B
#106
Nyssa
County, OR
89 B
#107
Seal Rock
County, OR
89 B
#108
Umatilla
County, OR
89 B
#109
Yamhill
County, OR
89 B
#110
Ashland
County, OR
88 B
#111
Brookings
County, OR
88 B
#112
Joseph
County, OR
88 B
#113
Lowell
County, OR
88 B
#114
Milwaukie
County, OR
88 B
#115
Springfield
County, OR
88 B
#116
Eagle Point
County, OR
87 B
#117
Fairview
County, OR
87 B
#118
Gaston
County, OR
87 B
#119
Island City
County, OR
87 B
#120
Manzanita
County, OR
87 B

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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