How hard is the water in Hinsdale County, CO?
9.1 grains per gallon
A softener is worth it here.
The median hardness measured in Hinsdale County, CO is 156 mg/L as calcium carbonate, which is 9.1 gpg. That is hard on the USGS scale. It comes from 7 samples at 7 sites between 1991 and 2025, 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 7.7 and 14.3 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: medium (how it is measured).
What to do next
At 9.1 gpg a softener is worth getting, mainly to protect the water heater and cut soap use. Get at least two quotes, ask each installer what grain capacity they are fitting, and check it against the sizing table below. Because Hinsdale County straddles a decision line, check your own tap with a $10 test strip before you spend anything.
More on sizing a softener for your household.
From 5.5 to 20.3 gpg
The softest single sample on record in Hinsdale County was 93.6 mg/L and the hardest 348 mg/L, a 4-fold gap. The top quarter of sites read above 14.3 gpg and the bottom quarter below 7.7 gpg.
Wells 9.1 gpg, rivers and lakes 3.7 gpg
7 groundwater samples from 7 wells put the median at 156 mg/L. 674 surface samples from 144 sites put it at 62.6 mg/L. In Hinsdale County the wells come out 5.4 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. A utility here that draws from the river can deliver noticeably different water from a private well next door.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 199 lb of salt a year (5 bags of 40 lb, about $36), and roughly 2,346 gallons of regeneration water. Installed, most units run $1,000 to $4,500; spread over 15 years with salt, that is about $136 a year.
Sizing at 9.1 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 546 | 24,000 | 66 lb |
| 2 | 1,092 | 24,000 | 133 lb |
| 4 | 2,184 | 24,000 | 266 lb |
| 6 | 3,276 | 24,000 | 399 lb |
Hinsdale County against the rest of Colorado
Among the 63 Colorado counties with data, Hinsdale County is number 38 of 63 counting from the hardest. Across the whole country it is harder than 47% of counties.
Softest in Colorado: Larimer County at 0.4 gpg. Hardest: Mesa County at 143.7 gpg. Closest to Hinsdale County: Gunnison County (9.1), Huerfano County (9.3), Summit County (9.4).