countyscore

Best Water Quality Counties in North Dakota

EPA drinking water health violations and safety grades Compare rankings across all 53 counties.

Average Water Quality Score
72/100
Top County
Adams County
Counties Ranked
52

Top 10

#1
Adams County
ND
86/100
#2
Barnes County
ND
86/100
#3
Billings County
ND
86/100
#4
Bowman County
ND
86/100
#5
Burleigh County
ND
86/100
#6
Cavalier County
ND
86/100
#7
Dunn County
ND
86/100
#8
Eddy County
ND
86/100
#9
Emmons County
ND
86/100
#10
Foster County
ND
86/100

All North Dakota Counties Ranked

#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
46.8
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
42.7
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

Data Source

Water Quality data from WaterByCounty. See full details at WaterByCounty. Data updated February 2026.