How hard is the water in Kiowa County, CO?
43.5 grains per gallon
A softener will pay its way here.
The median hardness measured in Kiowa County, CO is 745 mg/L as calcium carbonate, which is 43.5 gpg. That is very hard on the USGS scale. It comes from 85 samples at 28 sites between 1993 and 2025, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 31.6 and 64.3 gpg. The whole middle of that range gives the same answer, so a test of your own tap is unlikely to change it. Confidence in the county figure: high (how it is measured).
What to do next
At 43.5 gpg a softener pays its way here. Before you buy, check the quoted unit's grain capacity against the sizing table below, and ask whether it regenerates on demand, which uses less salt than a timer. Call your utility for its own report if you are on city water.
More on sizing a softener for your household.
From 7.0 to 81.8 gpg
The softest single sample on record in Kiowa County was 120 mg/L and the hardest 1,400 mg/L, a 12-fold gap. The top quarter of sites read above 64.3 gpg and the bottom quarter below 31.6 gpg.
Wells 43.1 gpg, rivers and lakes 43.9 gpg
1 groundwater samples from 1 wells put the median at 737 mg/L. 84 surface samples from 27 sites put it at 752 mg/L. In Kiowa 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.
What a softener would cost to run
For a household of 3, a 64,000-grain unit covers a week between regenerations. Expect about 950 lb of salt a year (24 bags of 40 lb, about $171), 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 $271 a year.
Sizing at 43.5 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 2,610 | 24,000 | 318 lb |
| 2 | 5,220 | 40,000 | 635 lb |
| 4 | 10,440 | 80,000 | 1,270 lb |
| 6 | 15,660 | twin tank | 1,905 lb |
Kiowa County against the rest of Colorado
Among the 63 Colorado counties with data, Kiowa County is number 4 of 63 counting from the hardest. Across the whole country it is harder than 97% of counties.
Softest in Colorado: Larimer County at 0.4 gpg. Hardest: Mesa County at 143.7 gpg. Closest to Kiowa County: Sedgwick County (42.6), Otero County (39.4), Morgan County (38.7).