City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#6529
Onamia
County, MN
84 B
#6530 Ontario
County, OR
84 B
#6531 Opp
County, AL
84 B
#6532 Osgood
County, IN
84 B
#6533 Ottawa
County, KS
84 B
#6534 Pageland
County, SC
84 B
#6535 Palos Hills
County, IL
84 B
#6536 Parlier
County, CA
84 B
#6537 Pascagoula
County, MS
84 B
#6538 Paul Smiths
County, NY
84 B
#6539 Pembroke
County, NC
84 B
#6540 Pemeberton
County, NJ
84 B
#6541 Pepperell
County, MA
84 B
#6542 Phenix City
County, AL
84 B
#6543 Pickens
County, SC
84 B
#6544 Platte
County, SD
84 B
#6545 Pomona
County, CA
84 B
#6546 Princeton
County, MN
84 B
#6547 Princeville
County, IL
84 B
#6548 Proctor
County, MN
84 B
#6549 Quarryville
County, PA
84 B
#6550 Queen City
County, TX
84 B
#6551 Ramsey
County, IN
84 B
#6552 Randolph
County, MA
84 B
Frequently Asked Questions
How are city water quality rankings calculated?
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 US cities directly?
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.