How hard is the water in Kent County, RI?

0.7 grains per gallon

You do not need a softener here.

The median hardness measured in Kent County, RI is 12 mg/L as calcium carbonate, which is 0.7 gpg. That is soft on the USGS scale. It comes from 25 samples at 12 sites between 1999 and 1999, 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 0.6 and 1 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: medium (how it is measured).

What to do next

You can skip the softener. At 0.7 gpg the most a softener would fix is the odd water spot. If a salesperson in Kent County says otherwise, ask to see their reading in grains per gallon and compare it with this one.

More on when a softener is not worth it.

From 0.3 to 1.4 gpg

The softest single sample on record in Kent County was 5.8 mg/L and the hardest 24.8 mg/L, a 4-fold gap. The top quarter of sites read above 1 gpg and the bottom quarter below 0.6 gpg.

Kent County against the rest of Rhode Island

Among the 4 Rhode Island counties with data, Kent County is the softest. Across the whole country it is harder than 4% of counties.

Hardest: Newport County at 2.5 gpg. Closest to Kent County: Providence County (1.1), Washington County (2.2), Newport County (2.5).