City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3337
Ireland
County, IN
94 A
#3338 Irvine
County, CA
94 A
#3339 Isle Of Palms
County, SC
94 A
#3340 Jamestown
County, KY
94 A
#3341 Jane
County, MO
94 A
#3342 Jesup
County, GA
94 A
#3343 Joinerville
County, TX
94 A
#3344 Jordan
County, AR
94 A
#3345 Joshua Tree
County, CA
94 A
#3346 Keene
County, NH
94 A
#3347 Keewatin
County, MN
94 A
#3348 Kenbridge
County, VA
94 A
#3349 Kennedale
County, TX
94 A
#3350 Kerman
County, CA
94 A
#3351 Keystone
County, CO
94 A
#3352 Kiel
County, WI
94 A
#3353 Kingsburg
County, CA
94 A
#3354 Kingston
County, TN
94 A
#3355 Kirby
County, AR
94 A
#3356 Knightstown
County, IN
94 A
#3357 Krotz Springs
County, LA
94 A
#3358 La Canada
County, CA
94 A
#3359 La Crescenta
County, CA
94 A
#3360 Lake Andes
County, SD
94 A
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.