Well water hardness in Arkansas
Across 19 counties of Arkansas, the median well sampled by the USGS has 8.6 gpg of hardness. Counties range from 0.7 gpg (Union County) to 24.4 gpg (Chicot County).
Millions of American households drink water from their own well. No utility tests that water and no water quality report covers it. These pages summarise the hardness the U.S. Geological Survey measured in wells county by county, so you know what to expect before you test your own well.
Counties, hardest first
| gpg | mg/L | wells | ||
|---|---|---|---|---|
| Chicot County | 24.4 | 419 | 22 | very hard |
| Crawford County | 22.4 | 384 | 11 | very hard |
| Arkansas County | 21.3 | 365 | 17 | very hard |
| Monroe County | 20.4 | 350 | 25 | very hard |
| Poinsett County | 15.9 | 272 | 11 | very hard |
| Boone County | 13.1 | 224 | 24 | very hard |
| Carroll County | 13 | 223 | 11 | very hard |
| Lonoke County | 9.8 | 169 | 14 | hard |
| Washington County | 9.8 | 168 | 15 | hard |
| Craighead County | 8.6 | 147 | 16 | hard |
| Benton County | 7.7 | 132 | 48 | hard |
| Crittenden County | 7.4 | 126 | 12 | hard |
| Woodruff County | 4.3 | 74 | 56 | moderately hard |
| Faulkner County | 4.3 | 73 | 52 | moderately hard |
| Van Buren County | 3.8 | 66 | 64 | moderately hard |
| White County | 2.8 | 49 | 12 | soft |
| Ouachita County | 1.9 | 33 | 28 | soft |
| Garland County | 1 | 17 | 29 | soft |
| Union County | 0.7 | 12 | 40 | soft |
Counties with fewer than 10 sampled wells, or a median outside 5–500 mg/L, are not shown until the figure is reviewed.
Arkansas: tap water hardness by city → · Well water hardness by state and county →