City Water Quality Rankings in North Dakota
65 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#49
Petersburg
County, ND
90 A
#50 Rugby
County, ND
90 A
#51 Belcourt
County, ND
89 B
#52 Williston
County, ND
89 B
#53 Cando
County, ND
88 B
#54 Ellendale
County, ND
88 B
#55 Thompson
County, ND
88 B
#56 Bottineau
County, ND
85 B
#57 Horace
County, ND
85 B
#58 Crosby
County, ND
84 B
#59 Fort Yates
County, ND
84 B
#60 Mayville
County, ND
84 B
#61 Oakes
County, ND
82 B
#62 New Rockford
County, ND
78 B
#63 Alexander
County, ND
76 B
#64 Lincoln
County, ND
66 C
#65 Hankinson
County, ND
0 F
Frequently Asked Questions
How are city water quality rankings calculated in North Dakota?
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 cities in North Dakota?
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.