How hard is the water in Dallam County, TX?
11 grains per gallon
A softener will pay its way here.
The median hardness measured in Dallam County, TX is 189 mg/L as calcium carbonate, which is 11 gpg. That is very hard on the USGS scale. It comes from 15 samples at 10 sites between 1999 and 2020, 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 6.3 and 12.2 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
At 11 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. Because Dallam County straddles a decision line, check your own tap with a $10 test strip before you spend anything.
More on sizing a softener for your household.
From 0.8 to 14.5 gpg
The softest single sample on record in Dallam County was 14.1 mg/L and the hardest 248 mg/L, an 18-fold gap. The top quarter of sites read above 12.2 gpg and the bottom quarter below 6.3 gpg. So even here some sites draw water soft enough to need nothing at all.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 241 lb of salt a year (7 bags of 40 lb, about $43), 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 $143 a year.
Sizing at 11 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 660 | 24,000 | 80 lb |
| 2 | 1,320 | 24,000 | 161 lb |
| 4 | 2,640 | 24,000 | 321 lb |
| 6 | 3,960 | 32,000 | 482 lb |
Dallam County against the rest of Texas
Among the 217 Texas counties with data, Dallam County is number 126 of 217 counting from the hardest. Across the whole country it is harder than 55% of counties.
Softest in Texas: Nacogdoches County at 0.3 gpg. Hardest: Ward County at 218.5 gpg. Closest to Dallam County: Real County (11), Donley County (11), Hartley County (11).