WaterQ

City Water Quality Rankings in Oregon

181 cities ranked by drinking water quality.

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Popular city water quality comparisons

Happy Valley, OR vs Lakeside, OR Compare → Oregon City, OR vs Pleasant Hill, OR Compare → West Linn, OR vs Winston, OR Compare → Ophir, OR vs Sunriver, OR Compare →

Trending Cities

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#97
Fairview
County, OR
89 B
#98
Glide
County, OR
89 B
#99
Hood River
County, OR
89 B
#100
Milwaukie
County, OR
89 B
#101
Nyssa
County, OR
89 B
#102
Seal Rock
County, OR
89 B
#103
Springfield
County, OR
89 B
#104
Umatilla
County, OR
89 B
#105
Ashland
County, OR
88 B
#106
Brookings
County, OR
88 B
#107
Irrigon
County, OR
87 B
#108
Manzanita
County, OR
87 B
#109
Netarts
County, OR
87 B
#110
Tillamook
County, OR
87 B
#111
Vale
County, OR
87 B
#112
Corbett
County, OR
86 B
#113
Dillard
County, OR
86 B
#114
Mt. Angel
County, OR
86 B
#115
Pendleton
County, OR
86 B
#116
Roseburg
County, OR
86 B
#117
Sandy
County, OR
86 B
#118
Stanfield
County, OR
86 B
#119
Tigard
County, OR
86 B
#120
Vernonia
County, OR
86 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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