How hard is the water in Stevens County, WA?
5 grains per gallon
Optional: a softener helps, but plenty of homes skip it.
The median hardness measured in Stevens County, WA is 86 mg/L as calcium carbonate, which is 5 gpg. That is moderately hard on the USGS scale. It comes from 117 samples at 49 sites between 1990 and 2012, 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 3.2 and 11.6 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 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 Stevens 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 1.3 to 225.8 gpg
The softest single sample on record in Stevens County was 22.8 mg/L and the hardest 3,865 mg/L, a 170-fold gap. The top quarter of sites read above 11.6 gpg and the bottom quarter below 3.2 gpg.
Wells 5 gpg, rivers and lakes 4.1 gpg
117 groundwater samples from 49 wells put the median at 86.1 mg/L. 162 surface samples from 14 sites put it at 70.9 mg/L. In Stevens County the wells come out 0.9 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. 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 24,000-grain unit covers a week between regenerations. Expect about 110 lb of salt a year (3 bags of 40 lb, about $20), 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 $120 a year.
Sizing at 5 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 300 | 24,000 | 37 lb |
| 2 | 600 | 24,000 | 73 lb |
| 4 | 1,200 | 24,000 | 146 lb |
| 6 | 1,800 | 24,000 | 219 lb |
Stevens County against the rest of Washington
Among the 38 Washington counties with data, Stevens County is number 15 of 38 counting from the hardest. Across the whole country it is harder than 31% of counties.
Softest in Washington: Chelan County at 0.6 gpg. Hardest: Island County at 20.7 gpg. Closest to Stevens County: Douglas County (4.3), Walla Walla County (4.3), Kitsap County (4.2).