How hard is the water in San Augustine County, TX?

1.4 grains per gallon

You do not need a softener here.

The median hardness measured in San Augustine County, TX is 24 mg/L as calcium carbonate, which is 1.4 gpg. That is soft on the USGS scale. It comes from 35 samples at 2 sites between 1994 and 2004, drawn from every sampling site in the county, wells and surface water together.

How much it varies here

Half the sites came in between 1.2 and 1.6 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 1.4 gpg the most a softener would fix is the odd water spot. If a salesperson in San Augustine 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 1.0 to 1.8 gpg

The softest single sample on record in San Augustine County was 16.5 mg/L and the hardest 30.5 mg/L, a 2-fold gap. The top quarter of sites read above 1.6 gpg and the bottom quarter below 1.2 gpg.

Wells 1 gpg, rivers and lakes 1.8 gpg

1 groundwater samples from 1 wells put the median at 16.5 mg/L. 34 surface samples from 1 sites put it at 30.5 mg/L. In San Augustine County the rivers and lakes come out 0.8 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.

San Augustine County against the rest of Texas

Among the 217 Texas counties with data, San Augustine County is number 209 of 217 counting from the hardest. Across the whole country it is harder than 11% of counties.

Softest in Texas: Nacogdoches County at 0.3 gpg. Hardest: Ward County at 218.5 gpg. Closest to San Augustine County: Gonzales County (1.4), Gregg County (1.4), Harrison County (1.5).