City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#769
Newton
County, KS
100 A
#770 Niagara Falls
County, NY
100 A
#771 Nice
County, CA
100 A
#772 Nicollet
County, MN
100 A
#773 Ninety Six
County, SC
100 A
#774 Nipomo
County, CA
100 A
#775 Nooksack
County, WA
100 A
#776 Norphlet
County, AR
100 A
#777 Norris
County, SC
100 A
#778 Norris
County, TN
100 A
#779 North
County, SC
100 A
#780 North Bend
County, NE
100 A
#781 North Bonneville
County, WA
100 A
#782 North Hero
County, VT
100 A
#783 North Las Vegas
County, NV
100 A
#784 North Lewisburg
County, OH
100 A
#785 North Little Rock
County, AR
100 A
#786 North Ridgeville
County, OH
100 A
#787 North Tonawanda
County, NY
100 A
#788 Northbridge
County, MA
100 A
#789 Northglenn
County, CO
100 A
#790 Northlake
County, TX
100 A
#791 Northville
County, MI
100 A
#792 Norton
County, VA
100 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.