countyscore

Water Quality · North Dakota

Best Water Quality Counties in North Dakota 2026

Ranked by EPA drinking water health violations.

Top 10 — Water Quality in North Dakota

Score reflects water quality only — not overall county quality.

1Adams County, ND
86
2Barnes County, ND
86
3Billings County, ND
86
4Bowman County, ND
86
5Burleigh County, ND
86
6Cavalier County, ND
86
7Dunn County, ND
86
8Eddy County, ND
86
9Emmons County, ND
86
10Foster County, ND
86

All North Dakota Counties — Water Quality Rankings

52 counties ranked by water quality score. Overall Score shown for context.

#CountyWater Quality ScoreOverall Score
1Adams County, ND
86
62.2
2Barnes County, ND
86
56.2
3Billings County, ND
86
84.1
4Bowman County, ND
86
64.9
5Burleigh County, ND
86
45.4
6Cavalier County, ND
86
66
7Dunn County, ND
86
61.5
8Eddy County, ND
86
60.3
9Emmons County, ND
86
60.4
10Foster County, ND
86
64.3
11Golden Valley County, ND
86
68.1
12Grand Forks County, ND
86
40.5
13Grant County, ND
86
66.7
14Griggs County, ND
86
70
15Hettinger County, ND
86
62.1
16Kidder County, ND
86
69.8
17LaMoure County, ND
86
70.4
18Logan County, ND
86
67.4
19McIntosh County, ND
86
60.7
20McLean County, ND
86
60.1
21Mercer County, ND
86
60.6
22Morton County, ND
86
38.5
23Mountrail County, ND
86
60.7
24Nelson County, ND
86
71.5
25Oliver County, ND
86
74.1
26Pembina County, ND
86
69
27Pierce County, ND
86
63.9
28Ramsey County, ND
86
50.4
29Ransom County, ND
86
66.7
30Renville County, ND
86
66.8
31Richland County, ND
86
51.7
32Slope County, ND
86
77.4
33Stark County, ND
86
46.9
34Steele County, ND
86
75.8
35Towner County, ND
86
60.4
36Traill County, ND
86
64.5
37Walsh County, ND
86
54.6
38Ward County, ND
86
48.2
39Cass County, ND
69.7
38.9
40Williams County, ND
61.7
42.8
41McKenzie County, ND
57.5
48.8
42Stutsman County, ND
56.4
48.3
43Rolette County, ND
42.3
57.6
44Wells County, ND
39.6
68.2
45Divide County, ND
30.6
72.2
46Dickey County, ND
26.3
62.6
47McHenry County, ND
25.6
69.3
48Sargent County, ND
13.2
60.6
49Benson County, ND
12.3
63.2
50Burke County, ND
9.4
72.5
51Bottineau County, ND
7.9
61.3
52Sheridan County, ND
4.7
62.1

Explore More

Best overall counties in North DakotaFull Water Quality data on WaterByCounty