How hard is the water in Bent County, CO?
5.6 grains per gallon
Optional: a softener helps, but plenty of homes skip it.
The median hardness measured in Bent County, CO is 95 mg/L as calcium carbonate, which is 5.6 gpg. That is moderately hard on the USGS scale. It comes from 103 samples at 20 sites between 1990 and 2026, 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 4.7 and 7.6 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
At 5.6 gpg this is your call. Look for white film on glasses and crust on the shower head: if you see little of either, you can live without one. If you do want one, a 24,000-grain unit is enough, so ask for that size rather than a bigger one. Because Bent 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 2.3 to 140.2 gpg
The softest single sample on record in Bent County was 39.6 mg/L and the hardest 2,400 mg/L, a 61-fold gap. The top quarter of sites read above 7.6 gpg and the bottom quarter below 4.7 gpg.
Wells 5.6 gpg, rivers and lakes 48.1 gpg
103 groundwater samples from 20 wells put the median at 95.4 mg/L. 686 surface samples from 68 sites put it at 822.8 mg/L. In Bent County the rivers and lakes come out 42.5 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. A utility here that draws from the aquifer 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 122 lb of salt a year (4 bags of 40 lb, about $22), 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 $122 a year.
Sizing at 5.6 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 336 | 24,000 | 41 lb |
| 2 | 672 | 24,000 | 82 lb |
| 4 | 1,344 | 24,000 | 164 lb |
| 6 | 2,016 | 24,000 | 245 lb |
Bent County against the rest of Colorado
Among the 63 Colorado counties with data, Bent County is number 54 of 63 counting from the hardest. Across the whole country it is harder than 33% of counties.
Softest in Colorado: Larimer County at 0.4 gpg. Hardest: Mesa County at 143.7 gpg. Closest to Bent County: Prowers County (5.3), Archuleta County (5.8), Pitkin County (5.8).