countyscore

Best Water Quality Counties in Tennessee

EPA drinking water health violations and safety grades Compare rankings across all 95 counties.

Average Water Quality Score
71/100
Top County
Anderson County
Counties Ranked
95

Top 10

#1
Anderson County
TN
86/100
#2
Benton County
TN
86/100
#3
Bradley County
TN
86/100
#4
Campbell County
TN
86/100
#5
Cannon County
TN
86/100
#6
Carroll County
TN
86/100
#7
Cheatham County
TN
86/100
#8
Chester County
TN
86/100
#9
Claiborne County
TN
86/100
#10
Cocke County
TN
86/100

All Tennessee Counties Ranked

#CountyWater Quality ScoreOverall Score
1Anderson County, TN
86
45.1
2Benton County, TN
86
54.1
3Bradley County, TN
86
43.5
4Campbell County, TN
86
50.9
5Cannon County, TN
86
63.5
6Carroll County, TN
86
53.8
7Cheatham County, TN
86
46.5
8Chester County, TN
86
61.2
9Claiborne County, TN
86
64.5
10Cocke County, TN
86
43.9
11Coffee County, TN
86
44
12Crockett County, TN
86
48.9
13Cumberland County, TN
86
51.2
14Davidson County, TN
86
31.6
15Decatur County, TN
86
57.1
16Dickson County, TN
86
48.2
17Dyer County, TN
86
44.8
18Fayette County, TN
86
55.6
19Franklin County, TN
86
47.6
20Gibson County, TN
86
44.9
21Grainger County, TN
86
60.6
22Hamblen County, TN
86
46.5
23Hancock County, TN
86
59.9
24Hardeman County, TN
86
40.7
25Haywood County, TN
86
41.8
26Henderson County, TN
86
53.1
27Henry County, TN
86
53.6
28Hickman County, TN
86
45.5
29Houston County, TN
86
59.5
30Humphreys County, TN
86
52.2
31Jefferson County, TN
86
53.8
32Johnson County, TN
86
61.5
33Knox County, TN
86
40.8
34Lake County, TN
86
47.1
35Lauderdale County, TN
86
45.3
36Lawrence County, TN
86
53.8
37Lewis County, TN
86
52.7
38Lincoln County, TN
86
55.5
39Loudon County, TN
86
54.4
40Macon County, TN
86
50.3
41Madison County, TN
86
33.9
42Marion County, TN
86
50.5
43Marshall County, TN
86
49.5
44Maury County, TN
86
40.7
45McMinn County, TN
86
45.2
46McNairy County, TN
86
54.6
47Meigs County, TN
86
55.6
48Moore County, TN
86
65.9
49Morgan County, TN
86
62.1
50Obion County, TN
86
45.2
51Overton County, TN
86
53.2
52Perry County, TN
86
68.2
53Polk County, TN
86
55.2
54Putnam County, TN
86
44
55Scott County, TN
86
57.8
56Sequatchie County, TN
86
52
57Sevier County, TN
86
46.8
58Shelby County, TN
86
22.3
59Sullivan County, TN
86
52.8
60Sumner County, TN
86
54.9
61Unicoi County, TN
86
59.5
62Weakley County, TN
86
51
63White County, TN
86
57.9
64Hamilton County, TN
71.8
35.7
65Blount County, TN
70.8
53.4
66Rutherford County, TN
70.1
43.4
67Tipton County, TN
69
46.7
68Washington County, TN
66.2
54.9
69Hardin County, TN
65.3
46.3
70Greene County, TN
64.8
53.3
71Carter County, TN
62
44.7
72Williamson County, TN
62
60.7
73Warren County, TN
60.8
50.6
74Wilson County, TN
57.2
50.8
75Montgomery County, TN
55.1
37.4
76Robertson County, TN
53.4
43.5
77Union County, TN
50.5
54.6
78Monroe County, TN
49.4
51.9
79Roane County, TN
46.5
53
80Bledsoe County, TN
42.5
60.4
81Giles County, TN
42.3
50.7
82Bedford County, TN
37.5
40.8
83Rhea County, TN
35.1
50.1
84DeKalb County, TN
32
51.5
85Hawkins County, TN
31.9
47.1
86Fentress County, TN
29.2
56.5
87Clay County, TN
25
64.2
88Pickett County, TN
20.2
67.3
89Smith County, TN
18.9
50.5
90Stewart County, TN
17.4
59.9
91Grundy County, TN
17
47.5
92Trousdale County, TN
15.5
52.1
93Wayne County, TN
8.2
61.4
94Jackson County, TN
7.7
53.2
95Van Buren County, TN
3.5
69

Data Source

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