City Water Quality Rankings
11,696 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#1705
Modesto
County, CA
98 A
#1706 Mooresville
County, NC
98 A
#1707 Mora
County, MN
98 A
#1708 Morley
County, MO
98 A
#1709 Morrisonville
County, NY
98 A
#1710 Mountain Home
County, AR
98 A
#1711 Mt Morris
County, MI
98 A
#1712 Mulberry
County, IN
98 A
#1713 Muskegon
County, MI
98 A
#1714 N Swanzey
County, NH
98 A
#1715 Nampa
County, ID
98 A
#1716 Napanoch
County, NY
98 A
#1717 Naperville
County, IL
98 A
#1718 Nashville
County, MI
98 A
#1719 Neodesha
County, KS
98 A
#1720 New Hudson
County, MI
98 A
#1721 New Miami
County, OH
98 A
#1722 New Plymouth
County, ID
98 A
#1723 New Town
County, ND
98 A
#1724 Newport
County, WA
98 A
#1725 Niles
County, OH
98 A
#1726 Norfolk
County, VA
98 A
#1727 North Augusta
County, SC
98 A
#1728 North Mankato
County, MN
98 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.