How hard is the water in Terrell County, TX?
13.7 grains per gallon
A softener will pay its way here.
The median hardness measured in Terrell County, TX is 235 mg/L as calcium carbonate, which is 13.7 gpg. That is very hard on the USGS scale. It comes from 5 samples at 5 sites between 2000 and 2017, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 13 and 21.3 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 13.7 gpg a softener pays its way here. Before you buy, check the quoted unit's grain capacity against the sizing table below, and ask whether it regenerates on demand, which uses less salt than a timer. Call your utility for its own report if you are on city water.
More on sizing a softener for your household.
From 12.4 to 21.7 gpg
The softest single sample on record in Terrell County was 213 mg/L and the hardest 372 mg/L, a 2-fold gap. The top quarter of sites read above 21.3 gpg and the bottom quarter below 13 gpg.
Wells 12.7 gpg, rivers and lakes 21.3 gpg
2 groundwater samples from 2 wells put the median at 218 mg/L. 3 surface samples from 3 sites put it at 365 mg/L. In Terrell County the rivers and lakes come out 8.6 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. A utility here that draws from the aquifer can deliver noticeably different water from a private well next door.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 300 lb of salt a year (8 bags of 40 lb, about $54), 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 $154 a year.
Sizing at 13.7 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 822 | 24,000 | 100 lb |
| 2 | 1,644 | 24,000 | 200 lb |
| 4 | 3,288 | 24,000 | 400 lb |
| 6 | 4,932 | 40,000 | 600 lb |
Terrell County against the rest of Texas
Among the 217 Texas counties with data, Terrell County is number 101 of 217 counting from the hardest. Across the whole country it is harder than 65% of counties.
Softest in Texas: Nacogdoches County at 0.3 gpg. Hardest: Ward County at 218.5 gpg. Closest to Terrell County: Hansford County (13.7), Wharton County (13.8), Castro County (13.6).