How hard is the water in Sublette County, WY?
3.1 grains per gallon
You do not need a softener here.
The median hardness measured in Sublette County, WY is 54 mg/L as calcium carbonate, which is 3.1 gpg. That is soft on the USGS scale. It comes from 43 samples at 38 sites between 1990 and 2023, drawn from groundwater wells, which is what most taps and private wells in the county draw on.
How much it varies here
Half the sites came in between 0.3 and 13.4 gpg. That spread crosses a decision line, so some homes here land on a different answer. A $10 test strip on your own tap settles it. Confidence in the county figure: high (how it is measured).
What to do next
You can skip the softener. At 3.1 gpg the most a softener would fix is the odd water spot. If a salesperson in Sublette County says otherwise, ask to see their reading in grains per gallon and compare it with this one. Because Sublette County straddles a decision line, check your own tap with a $10 test strip before you spend anything.
More on when a softener is not worth it.
From 0.1 to 34.2 gpg
The softest single sample on record in Sublette County was 1.8 mg/L and the hardest 585 mg/L, a 325-fold gap. The top quarter of sites read above 13.4 gpg and the bottom quarter below 0.3 gpg. So even in a soft county, a handful of wells here produce water hard enough to scale a heater.
Wells 3.1 gpg, rivers and lakes 3.9 gpg
43 groundwater samples from 38 wells put the median at 53.6 mg/L. 408 surface samples from 4 sites put it at 66.4 mg/L. In Sublette County the rivers and lakes come out 0.8 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. The two sources are close, so the county figure should hold whichever one your tap is on.
Sublette County against the rest of Wyoming
Among the 23 Wyoming counties with data, Sublette County is number 22 of 23 counting from the hardest. Across the whole country it is harder than 22% of counties.
Softest in Wyoming: Park County at 1.4 gpg. Hardest: Natrona County at 124.4 gpg. Closest to Sublette County: Park County (1.4), Washakie County (7.9), Teton County (8.5).