Private Well Water Testing in Tennessee
County-by-county USGS area-risk estimates for private wells across Tennessee — arsenic exceedance probability and private-well population — plus how to test your own well at a Tennessee-certified laboratory.
Tennessee private-well risk summary
Counties covered
95
Tennessee counties with modeled risk data.
People on private wells
area estimate697,759
estimated across covered Tennessee counties.
Average arsenic risk
area estimate2%
average modeled chance a well exceeds 10 µg/L arsenic across covered counties.
Tennessee counties
- Sevier County2% arsenic exceedance (area estimate)23,422 people on private wells
- McMinn County4% arsenic exceedance (area estimate)19,128 people on private wells
- Fayette County4% arsenic exceedance (area estimate)18,232 people on private wells
- Monroe County4% arsenic exceedance (area estimate)17,725 people on private wells
- Hawkins County6% arsenic exceedance (area estimate)15,417 people on private wells
- Weakley County3% arsenic exceedance (area estimate)15,161 people on private wells
- Bradley County3% arsenic exceedance (area estimate)14,846 people on private wells
- Coffee County2% arsenic exceedance (area estimate)14,346 people on private wells
- Cocke County3% arsenic exceedance (area estimate)14,196 people on private wells
- Madison County2% arsenic exceedance (area estimate)14,000 people on private wells
- Knox County2% arsenic exceedance (area estimate)13,622 people on private wells
- Hardeman County2% arsenic exceedance (area estimate)13,045 people on private wells
- Carroll County2% arsenic exceedance (area estimate)13,016 people on private wells
- Henry County2% arsenic exceedance (area estimate)13,007 people on private wells
- Jefferson County3% arsenic exceedance (area estimate)12,864 people on private wells
- Lawrence County2% arsenic exceedance (area estimate)12,604 people on private wells
- Roane County2% arsenic exceedance (area estimate)12,365 people on private wells
- Rutherford County2% arsenic exceedance (area estimate)12,343 people on private wells
- Blount County2% arsenic exceedance (area estimate)12,290 people on private wells
- Grainger County2% arsenic exceedance (area estimate)12,191 people on private wells
- Rhea County2% arsenic exceedance (area estimate)12,145 people on private wells
- Claiborne County1% arsenic exceedance (area estimate)11,396 people on private wells
- Gibson County3% arsenic exceedance (area estimate)11,354 people on private wells
- Greene County3% arsenic exceedance (area estimate)10,892 people on private wells
- Washington County1% arsenic exceedance (area estimate)9,953 people on private wells
- Dickson County1% arsenic exceedance (area estimate)9,760 people on private wells
- Sumner County2% arsenic exceedance (area estimate)9,671 people on private wells
- Williamson County1% arsenic exceedance (area estimate)9,253 people on private wells
- Tipton County4% arsenic exceedance (area estimate)8,578 people on private wells
- Wilson County4% arsenic exceedance (area estimate)8,498 people on private wells
- Hamilton County2% arsenic exceedance (area estimate)8,336 people on private wells
- Bledsoe County2% arsenic exceedance (area estimate)8,123 people on private wells
- Chester County3% arsenic exceedance (area estimate)8,086 people on private wells
- Union County2% arsenic exceedance (area estimate)8,032 people on private wells
- Loudon County2% arsenic exceedance (area estimate)7,959 people on private wells
- Henderson County2% arsenic exceedance (area estimate)7,775 people on private wells
- Cumberland County3% arsenic exceedance (area estimate)7,731 people on private wells
- Benton County1% arsenic exceedance (area estimate)7,607 people on private wells
- Wayne County1% arsenic exceedance (area estimate)7,516 people on private wells
- Marshall County2% arsenic exceedance (area estimate)7,396 people on private wells
- Polk County3% arsenic exceedance (area estimate)7,164 people on private wells
- Humphreys County1% arsenic exceedance (area estimate)7,096 people on private wells
- Meigs County2% arsenic exceedance (area estimate)7,050 people on private wells
- Sullivan County3% arsenic exceedance (area estimate)7,027 people on private wells
- Haywood County3% arsenic exceedance (area estimate)6,806 people on private wells
- Cannon County3% arsenic exceedance (area estimate)6,782 people on private wells
- Bedford County2% arsenic exceedance (area estimate)6,722 people on private wells
- Marion County2% arsenic exceedance (area estimate)6,568 people on private wells
- Lincoln County2% arsenic exceedance (area estimate)6,303 people on private wells
- Campbell County1% arsenic exceedance (area estimate)6,146 people on private wells
- Anderson County2% arsenic exceedance (area estimate)6,136 people on private wells
- Franklin County2% arsenic exceedance (area estimate)6,123 people on private wells
- Giles County3% arsenic exceedance (area estimate)6,111 people on private wells
- Morgan County2% arsenic exceedance (area estimate)6,014 people on private wells
- Cheatham County2% arsenic exceedance (area estimate)5,913 people on private wells
- Stewart County1% arsenic exceedance (area estimate)5,775 people on private wells
- Fentress County2% arsenic exceedance (area estimate)5,543 people on private wells
- Hamblen County3% arsenic exceedance (area estimate)5,220 people on private wells
- Maury County2% arsenic exceedance (area estimate)5,146 people on private wells
- Hardin County2% arsenic exceedance (area estimate)5,145 people on private wells
- Hickman County1% arsenic exceedance (area estimate)5,107 people on private wells
- Macon County2% arsenic exceedance (area estimate)5,079 people on private wells
- Sequatchie County2% arsenic exceedance (area estimate)5,016 people on private wells
- Overton County2% arsenic exceedance (area estimate)4,806 people on private wells
- Scott County1% arsenic exceedance (area estimate)4,723 people on private wells
- Warren County2% arsenic exceedance (area estimate)4,695 people on private wells
- McNairy County1% arsenic exceedance (area estimate)4,659 people on private wells
- Carter County2% arsenic exceedance (area estimate)4,115 people on private wells
- Smith County3% arsenic exceedance (area estimate)3,840 people on private wells
- Lewis County1% arsenic exceedance (area estimate)3,697 people on private wells
- Johnson County3% arsenic exceedance (area estimate)3,602 people on private wells
- Obion County4% arsenic exceedance (area estimate)3,554 people on private wells
- DeKalb County4% arsenic exceedance (area estimate)3,436 people on private wells
- Perry County1% arsenic exceedance (area estimate)3,004 people on private wells
- Robertson County2% arsenic exceedance (area estimate)3,000 people on private wells
- Davidson County2% arsenic exceedance (area estimate)2,860 people on private wells
- Grundy County3% arsenic exceedance (area estimate)2,821 people on private wells
- Shelby County4% arsenic exceedance (area estimate)2,805 people on private wells
- Hancock County2% arsenic exceedance (area estimate)2,748 people on private wells
- Decatur County2% arsenic exceedance (area estimate)2,682 people on private wells
- White County3% arsenic exceedance (area estimate)2,565 people on private wells
- Montgomery County1% arsenic exceedance (area estimate)2,430 people on private wells
- Putnam County2% arsenic exceedance (area estimate)2,178 people on private wells
- Jackson County2% arsenic exceedance (area estimate)2,111 people on private wells
- Dyer County3% arsenic exceedance (area estimate)1,964 people on private wells
- Crockett County3% arsenic exceedance (area estimate)1,811 people on private wells
- Clay County2% arsenic exceedance (area estimate)1,647 people on private wells
- Houston County1% arsenic exceedance (area estimate)1,615 people on private wells
- Moore County2% arsenic exceedance (area estimate)1,571 people on private wells
- Lauderdale County4% arsenic exceedance (area estimate)1,277 people on private wells
- Unicoi County2% arsenic exceedance (area estimate)1,187 people on private wells
- Trousdale County2% arsenic exceedance (area estimate)877 people on private wells
- Pickett County2% arsenic exceedance (area estimate)587 people on private wells
- Van Buren County5% arsenic exceedance (area estimate)554 people on private wells
- Lake County3% arsenic exceedance (area estimate)465 people on private wells
Find a Tennessee-certified testing lab
Get your well tested at a Tennessee-certified laboratory. We list certification programs by state.
These figures are USGS area estimates: statistical groundwater models describing how likely elevated contaminant levels are across a county. They are not designed to predict the concentration in any single well. Only testing your own well reveals its water quality.
By TapWaterData Editorial
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