How hard is the water in Pacific County, WA?

2.3 grains per gallon

You do not need a softener here.

The median hardness measured in Pacific County, WA is 39 mg/L as calcium carbonate, which is 2.3 gpg. That is soft on the USGS scale. It comes from 58 samples at 37 sites between 1992 and 2010, 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 1.3 and 3.6 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

You can skip the softener. At 2.3 gpg the most a softener would fix is the odd water spot. If a salesperson in Pacific County says otherwise, ask to see their reading in grains per gallon and compare it with this one. Because Pacific 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 0.4 to 26.1 gpg

The softest single sample on record in Pacific County was 6.3 mg/L and the hardest 447 mg/L, a 71-fold gap. The top quarter of sites read above 3.6 gpg and the bottom quarter below 1.3 gpg. So even in a soft county, a handful of wells here produce water hard enough to scale a heater.

Wells 2.3 gpg, rivers and lakes 3 gpg

58 groundwater samples from 37 wells put the median at 39.1 mg/L. 28 surface samples from 12 sites put it at 51 mg/L. In Pacific County the rivers and lakes come out 0.7 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.

Pacific County against the rest of Washington

Among the 38 Washington counties with data, Pacific County is number 33 of 38 counting from the hardest. Across the whole country it is harder than 18% of counties.

Softest in Washington: Chelan County at 0.6 gpg. Hardest: Island County at 20.7 gpg. Closest to Pacific County: Clallam County (2.5), Kittitas County (2.6), Grays Harbor County (1.9).