Well water hardness in Wyoming
Across 21 counties of Wyoming, the median well sampled by the USGS has 11.9 gpg of hardness. Counties range from 2.1 gpg (Sublette County) to 23.9 gpg (Crook 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 | ||
|---|---|---|---|---|
| Crook County | 23.9 | 410 | 18 | very hard |
| Sheridan County | 23.5 | 402 | 38 | very hard |
| Weston County | 16.5 | 282 | 16 | very hard |
| Big Horn County | 15.4 | 265 | 82 | very hard |
| Lincoln County | 14.3 | 245 | 73 | very hard |
| Hot Springs County | 14.2 | 243 | 36 | very hard |
| Platte County | 14 | 241 | 44 | very hard |
| Johnson County | 13.6 | 232 | 16 | very hard |
| Park County | 13.1 | 225 | 64 | very hard |
| Converse County | 11.9 | 203 | 64 | very hard |
| Washakie County | 11.9 | 203 | 23 | very hard |
| Campbell County | 11.7 | 200 | 67 | very hard |
| Goshen County | 11.4 | 195 | 35 | very hard |
| Carbon County | 11.1 | 191 | 59 | very hard |
| Albany County | 11 | 188 | 42 | very hard |
| Fremont County | 10.2 | 175 | 129 | hard |
| Niobrara County | 10 | 171 | 34 | hard |
| Laramie County | 9.4 | 161 | 74 | hard |
| Teton County | 7.3 | 125 | 116 | hard |
| Sweetwater County | 4.5 | 78 | 69 | moderately hard |
| Sublette County | 2.1 | 35 | 50 | soft |
Counties with fewer than 10 sampled wells, or a median outside 5–500 mg/L, are not shown until the figure is reviewed.