How hard is the water in Jefferson County, TX?

2.1 grains per gallon

You do not need a softener here.

The median hardness measured in Jefferson County, TX is 37 mg/L as calcium carbonate, which is 2.1 gpg. That is soft on the USGS scale. It comes from 5 samples at 5 sites between 1996 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 2.1 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: medium (how it is measured).

What to do next

You can skip the softener. At 2.1 gpg the most a softener would fix is the odd water spot. If a salesperson in Jefferson County says otherwise, ask to see their reading in grains per gallon and compare it with this one. Because Jefferson 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 0.5 to 3.6 gpg

The softest single sample on record in Jefferson County was 9.2 mg/L and the hardest 61.6 mg/L, a 7-fold gap. The top quarter of sites read above 3.6 gpg and the bottom quarter below 2.1 gpg.

Wells 2.1 gpg, rivers and lakes 4.9 gpg

5 groundwater samples from 5 wells put the median at 36.7 mg/L. 4 surface samples from 2 sites put it at 83.5 mg/L. In Jefferson County the rivers and lakes come out 2.8 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.

Jefferson County against the rest of Texas

Among the 217 Texas counties with data, Jefferson County is number 201 of 217 counting from the hardest. Across the whole country it is harder than 17% of counties.

Softest in Texas: Nacogdoches County at 0.3 gpg. Hardest: Ward County at 218.5 gpg. Closest to Jefferson County: Burleson County (2.1), Panola County (2.2), Camp County (2).