Water Hardness in Tennessee

95 counties — Average 94.3 PPM (Moderately Hard)

35
29
22
9
Soft (36.8%) Moderate (30.5%) Hard (23.2%) Very Hard (9.5%)

Tennessee Water Hardness Map

Soft   Moderate   Hard   Very Hard

Hardest Water Counties

Greene245 PPM
Hamblen230.5 PPM
Marshall209 PPM
Robertson200 PPM
Rutherford193.2 PPM
Sullivan220 PPM
Trousdale199 PPM
Washington245 PPM
Williamson200 PPM
Tennessee

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All 95 Counties — By Water Hardness

CountyClassificationHardness
Anderson Hard 140 PPM
Bedford Hard 130 PPM
Benton Soft 19 PPM
Bledsoe Moderate 75.5 PPM
Blount Soft 8.8 PPM
Bradley Hard 154 PPM
Campbell Moderate 105 PPM
Cannon Hard 154 PPM
Carroll Soft 15 PPM
Carter Soft 37 PPM
Cheatham Hard 130 PPM
Chester Soft 12 PPM
Claiborne Hard 132.5 PPM
Clay Moderate 94 PPM
Cocke Soft 32 PPM
Coffee Moderate 73 PPM
Crockett Soft 43.3 PPM
Cumberland Soft 26 PPM
Davidson Hard 158.2 PPM
DeKalb Moderate 83.3 PPM
Decatur Soft 31.1 PPM
Dickson Hard 153.2 PPM
Dyer Soft 38 PPM
Fayette Soft 17 PPM
Fentress Soft 41 PPM
Franklin Moderate 82.6 PPM
Gibson Soft 20 PPM
Giles Hard 124 PPM
Grainger Hard 172 PPM
Greene Very Hard 245 PPM
Grundy Soft 57.7 PPM
Hamblen Very Hard 230.5 PPM
Hamilton Moderate 74 PPM
Hancock Hard 167 PPM
Hardeman Soft 20 PPM
Hardin Soft 48 PPM
Hawkins Moderate 120 PPM
Haywood Soft 18 PPM
Henderson Soft 15 PPM
Henry Soft 24 PPM
Hickman Moderate 99.7 PPM
Houston Hard 150 PPM
Humphreys Moderate 99 PPM
Jackson Moderate 94.7 PPM
Jefferson Moderate 100 PPM
Johnson Soft 46 PPM
Knox Moderate 120 PPM
Lake Moderate 120 PPM
Lauderdale Hard 150 PPM
Lawrence Moderate 65 PPM
Lewis Soft 30.8 PPM
Lincoln Hard 158.5 PPM
Loudon Moderate 78 PPM
Macon Moderate 105 PPM
Madison Soft 18 PPM
Marion Moderate 74 PPM
Marshall Very Hard 209 PPM
Maury Hard 180 PPM
McMinn Hard 156 PPM
McNairy Soft 21 PPM
Meigs Moderate 120 PPM
Monroe Soft 23 PPM
Montgomery Hard 148.9 PPM
Moore Moderate 64.2 PPM
Morgan Soft 21.1 PPM
Obion Soft 26 PPM
Overton Hard 140 PPM
Perry Soft 40.8 PPM
Pickett Moderate 99.1 PPM
Polk Soft 20 PPM
Putnam Hard 143.7 PPM
Rhea Moderate 68 PPM
Roane Moderate 88 PPM
Robertson Very Hard 200 PPM
Rutherford Very Hard 193.2 PPM
Scott Soft 38.9 PPM
Sequatchie Moderate 110 PPM
Sevier Soft 40 PPM
Shelby Soft 51 PPM
Smith Moderate 86.7 PPM
Stewart Moderate 117.6 PPM
Sullivan Very Hard 220 PPM
Sumner Moderate 97 PPM
Tipton Moderate 62 PPM
Trousdale Very Hard 199 PPM
Unicoi Soft 19 PPM
Union Hard 163.5 PPM
Van Buren Soft 42.1 PPM
Warren Moderate 114 PPM
Washington Very Hard 245 PPM
Wayne Soft 45.5 PPM
Weakley Soft 18 PPM
White Hard 130 PPM
Williamson Very Hard 200 PPM
Wilson Hard 171 PPM

Source: USGS Water Quality Portal

Frequently Asked Questions

How hard is the water in Tennessee?

Tennessee has an average water hardness of 94.3 PPM, classified as moderately hard. Out of 95 counties, 35 have soft water, 29 moderately hard, 22 hard, and 9 very hard.

Which Tennessee counties have the hardest water?

Tennessee has 9 counties with very hard water (above 180 mg/L). See the county table above for a complete breakdown by hardness level.

How do I check water hardness for my Tennessee address?

Enter your ZIP code in the search box above to see your area's estimated water hardness, classification, and water utility information.