City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#3601
Summerton
County, SC
94 A
#3602 Surgoinsville
County, TN
94 A
#3603 Sutter Creek
County, CA
94 A
#3604 Swiftwater
County, PA
94 A
#3605 Sylacauga
County, AL
94 A
#3606 Sylvania
County, GA
94 A
#3607 Sylvania
County, OH
94 A
#3608 Taft
County, CA
94 A
#3609 Tamuning
County, GU
94 A
#3610 Taylor
County, MS
94 A
#3611 Tea
County, SD
94 A
#3612 Tecumseh
County, NE
94 A
#3613 Tekamah
County, NE
94 A
#3614 Telford
County, PA
94 A
#3615 Terrytown
County, NE
94 A
#3616 Thompson Falls
County, MT
94 A
#3617 Three Forks
County, MT
94 A
#3618 Three Rivers
County, CA
94 A
#3619 Tifton
County, GA
94 A
#3620 Tinker Afb
County, OK
94 A
#3621 Toledo
County, OR
94 A
#3622 Torrington
County, WY
94 A
#3623 Trenton
County, GA
94 A
#3624 Treynor
County, IA
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.