How hard is the water in Crook County, OR?
14 grains per gallon
A softener will pay its way here.
The median hardness measured in Crook County, OR is 240 mg/L as calcium carbonate, which is 14 gpg. That is very hard on the USGS scale. It comes from 144 samples at 45 sites between 1990 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 9.3 and 17 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 14 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. Because Crook 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 0.2 to 24.6 gpg
The softest single sample on record in Crook County was 3 mg/L and the hardest 421.5 mg/L, a 141-fold gap. The top quarter of sites read above 17 gpg and the bottom quarter below 9.3 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 14 gpg, rivers and lakes 5.9 gpg
144 groundwater samples from 45 wells put the median at 240 mg/L. 142 surface samples from 24 sites put it at 101.2 mg/L. In Crook County the wells come out 8.1 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 306 lb of salt a year (8 bags of 40 lb, about $55), 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 $155 a year.
Sizing at 14 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 840 | 24,000 | 102 lb |
| 2 | 1,680 | 24,000 | 204 lb |
| 4 | 3,360 | 24,000 | 409 lb |
| 6 | 5,040 | 40,000 | 613 lb |
Crook County against the rest of Oregon
Among the 36 Oregon counties with data, Crook County is number 3 of 36 counting from the hardest. Across the whole country it is harder than 66% of counties.
Softest in Oregon: Columbia County at 1.4 gpg. Hardest: Malheur County at 17.8 gpg. Closest to Crook County: Douglas County (14.8), Sherman County (12.9), Morrow County (12.6).