How hard is the water in Fort Bend County, TX?
8.5 grains per gallon
A softener is worth it here.
The median hardness measured in Fort Bend County, TX is 145 mg/L as calcium carbonate, which is 8.5 gpg. That is hard on the USGS scale. It comes from 12 samples at 7 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 8.3 and 9.2 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: medium (how it is measured).
What to do next
At 8.5 gpg a softener is worth getting, mainly to protect the water heater and cut soap use. Get at least two quotes, ask each installer what grain capacity they are fitting, and check it against the sizing table below.
More on sizing a softener for your household.
From 3.9 to 13.7 gpg
The softest single sample on record in Fort Bend County was 66.1 mg/L and the hardest 234 mg/L, a 4-fold gap. The top quarter of sites read above 9.2 gpg and the bottom quarter below 8.3 gpg.
Wells 8.5 gpg, rivers and lakes 10.8 gpg
12 groundwater samples from 7 wells put the median at 145 mg/L. 272 surface samples from 2 sites put it at 185 mg/L. In Fort Bend County the rivers and lakes come out 2.3 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.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 185 lb of salt a year (5 bags of 40 lb, about $33), and roughly 2,346 gallons of regeneration water. Installed, most units run $1,000 to $4,500; spread over 15 years with salt, that is about $133 a year.
Sizing at 8.5 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 510 | 24,000 | 62 lb |
| 2 | 1,020 | 24,000 | 124 lb |
| 4 | 2,040 | 24,000 | 248 lb |
| 6 | 3,060 | 24,000 | 372 lb |
Fort Bend County against the rest of Texas
Among the 217 Texas counties with data, Fort Bend County is number 146 of 217 counting from the hardest. Across the whole country it is harder than 44% of counties.
Softest in Texas: Nacogdoches County at 0.3 gpg. Hardest: Ward County at 218.5 gpg. Closest to Fort Bend County: Borden County (8.4), Harris County (8.4), Brazoria County (8.6).