How hard is the water in Bienville Parish, LA?

0.8 grains per gallon

You do not need a softener here.

The median hardness measured in Bienville Parish, LA is 13 mg/L as calcium carbonate, which is 0.8 gpg. That is soft on the USGS scale. It comes from 31 samples at 10 sites between 1999 and 2022, 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 0.4 and 5.3 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: high (how it is measured).

What to do next

You can skip the softener. At 0.8 gpg the most a softener would fix is the odd water spot. If a salesperson in Bienville Parish says otherwise, ask to see their reading in grains per gallon and compare it with this one. Because Bienville Parish 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 0.2 to 7.4 gpg

The softest single sample on record in Bienville Parish was 2.9 mg/L and the hardest 127 mg/L, a 44-fold gap. The top quarter of sites read above 5.3 gpg and the bottom quarter below 0.4 gpg.

Wells 0.8 gpg, rivers and lakes 1.3 gpg

31 groundwater samples from 10 wells put the median at 13.1 mg/L. 202 surface samples from 6 sites put it at 22.8 mg/L. In Bienville Parish the rivers and lakes come out 0.5 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.

Bienville Parish against the rest of Louisiana

Among the 64 Louisiana counties with data, Bienville Parish is number 50 of 64 counting from the hardest. Across the whole country it is harder than 4% of counties.

Softest in Louisiana: Lincoln Parish at 0.1 gpg. Hardest: St. Bernard Parish at 53.9 gpg. Closest to Bienville Parish: Claiborne Parish (0.8), Jackson Parish (0.7), West Feliciana Parish (0.8).