How hard is the water in Atlantic County, NJ?

0.9 grains per gallon

You do not need a softener here.

The median hardness measured in Atlantic County, NJ is 16 mg/L as calcium carbonate, which is 0.9 gpg. That is soft on the USGS scale. It comes from 172 samples at 97 sites between 1990 and 2023, 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 0.3 and 2 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: high (how it is measured).

What to do next

You can skip the softener. At 0.9 gpg the most a softener would fix is the odd water spot. If a salesperson in Atlantic 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 0.0 to 5.5 gpg

The softest single sample on record in Atlantic County was 0.6 mg/L and the hardest 94.4 mg/L, a 157-fold gap. The top quarter of sites read above 2 gpg and the bottom quarter below 0.3 gpg.

Wells 0.9 gpg, rivers and lakes 0.6 gpg

172 groundwater samples from 97 wells put the median at 16.1 mg/L. 649 surface samples from 28 sites put it at 10.7 mg/L. In Atlantic County the wells come out 0.3 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.

Atlantic County against the rest of New Jersey

Among the 21 New Jersey counties with data, Atlantic County is number 20 of 21 counting from the hardest. Across the whole country it is harder than 6% of counties.

Softest in New Jersey: Ocean County at 0.8 gpg. Hardest: Hudson County at 17.2 gpg. Closest to Atlantic County: Ocean County (0.8), Gloucester County (1.6), Camden County (2.3).