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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#73
Baker City
County, OR
91 A
#74
Dallas
County, OR
91 A
#75
Jefferson
County, OR
91 A
#76
Port Orford
County, OR
91 A
#77
Portland
County, OR
91 A
#78
Sutherlin
County, OR
91 A
#79
Athena
County, OR
90 A
#80
Aurora
County, OR
90 A
#81
Bay City
County, OR
90 A
#82
Bend
County, OR
90 A
#83
Clackamas
County, OR
90 A
#84
Corvallis
County, OR
90 A
#85
Depoe Bay
County, OR
90 A
#86
Enterprise
County, OR
90 A
#87
Forest Grove
County, OR
90 A
#88
Gervais
County, OR
90 A
#89
Gresham
County, OR
90 A
#90
Independence
County, OR
90 A
#91
Joseph
County, OR
90 A
#92
Lebanon
County, OR
90 A
#93
Medford
County, OR
90 A
#94
Ontario
County, OR
90 A
#95
Rockaway Beach
County, OR
90 A
#96
Union
County, OR
90 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.

Explore More Water Quality Data

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