countyscore

Best Water Quality Counties in Mississippi

EPA drinking water health violations and safety grades Compare rankings across all 82 counties.

Average Water Quality Score
52/100
Top County
Adams County
Counties Ranked
82

Top 10

#1
Adams County
MS
86/100
#2
Alcorn County
MS
86/100
#3
Attala County
MS
86/100
#4
Carroll County
MS
86/100
#5
Clarke County
MS
86/100
#6
George County
MS
86/100
#7
Neshoba County
MS
86/100
#8
Simpson County
MS
86/100
#9
Tishomingo County
MS
86/100
#10
Walthall County
MS
86/100

All Mississippi Counties Ranked

#CountyWater Quality ScoreOverall Score
1Adams County, MS
86
57.1
2Alcorn County, MS
86
43.8
3Attala County, MS
86
49.3
4Carroll County, MS
86
64.5
5Clarke County, MS
86
60.7
6George County, MS
86
40.5
7Neshoba County, MS
86
42
8Simpson County, MS
86
55.8
9Tishomingo County, MS
86
55.3
10Walthall County, MS
86
48.5
11Webster County, MS
86
62.3
12Wilkinson County, MS
86
54.8
13Winston County, MS
86
48.5
14Lauderdale County, MS
69.3
46.8
15Jones County, MS
69
40.7
16Lee County, MS
67.3
33.6
17Lincoln County, MS
66
41.6
18Scott County, MS
65.8
42.8
19Grenada County, MS
65.6
34.8
20Leflore County, MS
65.6
46.3
21Clay County, MS
64
41.3
22Forrest County, MS
63.2
30.3
23Lowndes County, MS
63.2
46.2
24Newton County, MS
63
56
25Leake County, MS
62.6
49
26Chickasaw County, MS
62.2
55.8
27Lamar County, MS
60.6
47.6
28Prentiss County, MS
60.1
43.6
29Jefferson Davis County, MS
59.1
56.2
30Tippah County, MS
59
56.7
31Monroe County, MS
58.7
47.5
32Pearl River County, MS
58.7
42.5
33DeSoto County, MS
58.1
36.7
34Harrison County, MS
57.9
30.1
35Kemper County, MS
57.9
62.8
36Lawrence County, MS
57.5
56.8
37Itawamba County, MS
57.2
55.1
38Marshall County, MS
56.8
45.3
39Jackson County, MS
56.6
38.6
40Oktibbeha County, MS
55.4
33.7
41Choctaw County, MS
55
62.7
42Madison County, MS
54.5
45.8
43Union County, MS
54.1
45.1
44Jefferson County, MS
53.6
52.3
45Lafayette County, MS
53.2
43.6
46Warren County, MS
52.9
31.9
47Pike County, MS
51.5
37.9
48Tunica County, MS
50.2
36.4
49Marion County, MS
49.4
49.4
50Amite County, MS
49
59.3
51Greene County, MS
48.5
55
52Yalobusha County, MS
47
47.1
53Covington County, MS
46.8
47.2
54Pontotoc County, MS
44.6
43.1
55Claiborne County, MS
44.2
55.3
56Panola County, MS
44.1
43.3
57Washington County, MS
42.4
48.4
58Yazoo County, MS
42.3
45.4
59Copiah County, MS
40.9
55.1
60Humphreys County, MS
39.5
48.3
61Stone County, MS
39.2
38.6
62Calhoun County, MS
37.8
55.8
63Rankin County, MS
36.1
53.7
64Hancock County, MS
36
35.6
65Noxubee County, MS
33.1
48.6
66Montgomery County, MS
31.6
58
67Hinds County, MS
31
38.3
68Bolivar County, MS
28.3
33.3
69Tate County, MS
28.2
37.7
70Wayne County, MS
27.9
41.9
71Perry County, MS
26.3
60.7
72Holmes County, MS
26
57
73Sunflower County, MS
21.2
46.4
74Jasper County, MS
19
53.9
75Franklin County, MS
17.5
60.2
76Benton County, MS
15.4
57.3
77Tallahatchie County, MS
11.4
47.5
78Smith County, MS
11.1
60.2
79Quitman County, MS
11
58.2
80Coahoma County, MS
6.6
44.8
81Sharkey County, MS
2.9
57
82Issaquena County, MS
0.9
68.6

Data Source

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