Private Well Water Testing in Arkansas
County-by-county USGS area-risk estimates for private wells across Arkansas — arsenic exceedance probability and private-well population — plus how to test your own well at a Arkansas-certified laboratory.
Arkansas private-well risk summary
Counties covered
75
Arkansas counties with modeled risk data.
People on private wells
area estimate470,309
estimated across covered Arkansas counties.
Average arsenic risk
area estimate1%
average modeled chance a well exceeds 10 µg/L arsenic across covered counties.
Arkansas counties
- Benton County1% arsenic exceedance (area estimate)23,769 people on private wells
- Garland County1% arsenic exceedance (area estimate)21,937 people on private wells
- Washington County1% arsenic exceedance (area estimate)20,283 people on private wells
- Faulkner County2% arsenic exceedance (area estimate)16,133 people on private wells
- Pope County2% arsenic exceedance (area estimate)14,475 people on private wells
- Baxter County1% arsenic exceedance (area estimate)14,225 people on private wells
- Miller County1% arsenic exceedance (area estimate)13,508 people on private wells
- White County2% arsenic exceedance (area estimate)13,107 people on private wells
- Hot Spring County1% arsenic exceedance (area estimate)12,863 people on private wells
- Boone County1% arsenic exceedance (area estimate)12,115 people on private wells
- Conway County2% arsenic exceedance (area estimate)11,468 people on private wells
- Pulaski County1% arsenic exceedance (area estimate)11,343 people on private wells
- Polk County1% arsenic exceedance (area estimate)11,320 people on private wells
- Greene County2% arsenic exceedance (area estimate)11,068 people on private wells
- Saline County1% arsenic exceedance (area estimate)10,178 people on private wells
- Carroll County1% arsenic exceedance (area estimate)9,591 people on private wells
- Hempstead County1% arsenic exceedance (area estimate)8,870 people on private wells
- Marion County1% arsenic exceedance (area estimate)8,805 people on private wells
- Logan County3% arsenic exceedance (area estimate)8,241 people on private wells
- Cleburne County2% arsenic exceedance (area estimate)8,104 people on private wells
- Randolph County1% arsenic exceedance (area estimate)7,780 people on private wells
- Crawford County1% arsenic exceedance (area estimate)7,551 people on private wells
- Sevier County1% arsenic exceedance (area estimate)7,539 people on private wells
- Madison County1% arsenic exceedance (area estimate)7,124 people on private wells
- Fulton County1% arsenic exceedance (area estimate)7,068 people on private wells
- Independence County1% arsenic exceedance (area estimate)6,776 people on private wells
- Lonoke County1% arsenic exceedance (area estimate)6,647 people on private wells
- Craighead County2% arsenic exceedance (area estimate)6,480 people on private wells
- Scott County1% arsenic exceedance (area estimate)6,390 people on private wells
- Montgomery County1% arsenic exceedance (area estimate)6,313 people on private wells
- Ashley County2% arsenic exceedance (area estimate)6,282 people on private wells
- Yell County2% arsenic exceedance (area estimate)6,280 people on private wells
- Howard County1% arsenic exceedance (area estimate)6,151 people on private wells
- Sebastian County2% arsenic exceedance (area estimate)6,116 people on private wells
- Sharp County1% arsenic exceedance (area estimate)5,905 people on private wells
- Pike County1% arsenic exceedance (area estimate)5,426 people on private wells
- Stone County1% arsenic exceedance (area estimate)5,141 people on private wells
- Columbia County1% arsenic exceedance (area estimate)5,035 people on private wells
- Van Buren County2% arsenic exceedance (area estimate)4,998 people on private wells
- Franklin County2% arsenic exceedance (area estimate)4,951 people on private wells
- Johnson County2% arsenic exceedance (area estimate)4,897 people on private wells
- Clark County1% arsenic exceedance (area estimate)4,889 people on private wells
- Ouachita County1% arsenic exceedance (area estimate)4,613 people on private wells
- Little River County1% arsenic exceedance (area estimate)4,468 people on private wells
- Nevada County1% arsenic exceedance (area estimate)4,273 people on private wells
- Perry County1% arsenic exceedance (area estimate)4,114 people on private wells
- Izard County1% arsenic exceedance (area estimate)3,806 people on private wells
- Jackson County1% arsenic exceedance (area estimate)3,418 people on private wells
- Lawrence County1% arsenic exceedance (area estimate)3,323 people on private wells
- Grant County1% arsenic exceedance (area estimate)3,307 people on private wells
- Searcy County1% arsenic exceedance (area estimate)3,235 people on private wells
- Bradley County1% arsenic exceedance (area estimate)2,906 people on private wells
- Lafayette County1% arsenic exceedance (area estimate)2,680 people on private wells
- Newton County1% arsenic exceedance (area estimate)2,525 people on private wells
- Prairie County1% arsenic exceedance (area estimate)2,454 people on private wells
- Clay County3% arsenic exceedance (area estimate)2,393 people on private wells
- Chicot County2% arsenic exceedance (area estimate)2,391 people on private wells
- Calhoun County1% arsenic exceedance (area estimate)2,149 people on private wells
- Dallas County1% arsenic exceedance (area estimate)1,905 people on private wells
- St. Francis County2% arsenic exceedance (area estimate)1,901 people on private wells
- Union County1% arsenic exceedance (area estimate)1,817 people on private wells
- Drew County1% arsenic exceedance (area estimate)1,802 people on private wells
- Desha County2% arsenic exceedance (area estimate)1,656 people on private wells
- Jefferson County1% arsenic exceedance (area estimate)1,466 people on private wells
- Lincoln County1% arsenic exceedance (area estimate)1,260 people on private wells
- Arkansas County2% arsenic exceedance (area estimate)1,213 people on private wells
- Cleveland County1% arsenic exceedance (area estimate)1,096 people on private wells
- Lee County2% arsenic exceedance (area estimate)1,061 people on private wells
- Mississippi County3% arsenic exceedance (area estimate)1,025 people on private wells
- Cross County2% arsenic exceedance (area estimate)1,002 people on private wells
- Poinsett County2% arsenic exceedance (area estimate)952 people on private wells
- Crittenden County3% arsenic exceedance (area estimate)880 people on private wells
- Woodruff County1% arsenic exceedance (area estimate)819 people on private wells
- Monroe County2% arsenic exceedance (area estimate)747 people on private wells
- Phillips County3% arsenic exceedance (area estimate)510 people on private wells
Find a Arkansas-certified testing lab
Get your well tested at a Arkansas-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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