How hard is the water in Newport County, RI?

2.5 grains per gallon

You do not need a softener here.

The median hardness measured in Newport County, RI is 43 mg/L as calcium carbonate, which is 2.5 gpg. That is soft on the USGS scale. It comes from 2 samples at 2 sites between 2001 and 2016, drawn from every sampling site in the county, wells and surface water together.

How much it varies here

Half the sites came in between 1.9 and 3.1 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: low (how it is measured).

What to do next

You can skip the softener. At 2.5 gpg the most a softener would fix is the odd water spot. If a salesperson in Newport 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.

Wells 3.7 gpg, rivers and lakes 1.3 gpg

1 groundwater samples from 1 wells put the median at 64 mg/L. 1 surface samples from 1 sites put it at 21.9 mg/L. In Newport County the wells come out 2.4 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.

Newport County against the rest of Rhode Island

Among the 4 Rhode Island counties with data, Newport County is the hardest. Across the whole country it is harder than 19% of counties.

Softest in Rhode Island: Kent County at 0.7 gpg. Closest to Newport County: Washington County (2.2), Providence County (1.1), Kent County (0.7).