How hard is the water in Guadalupe County, NM?
59.9 grains per gallon
A softener will pay its way here.
The median hardness measured in Guadalupe County, NM is 1025 mg/L as calcium carbonate, which is 59.9 gpg. That is very hard on the USGS scale. It comes from 270 samples at 28 sites between 1990 and 2021, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 20 and 100 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: high (how it is measured).
What to do next
At 59.9 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 4.9 to 104.0 gpg
The softest single sample on record in Guadalupe County was 83.2 mg/L and the hardest 1,780 mg/L, a 21-fold gap. The top quarter of sites read above 100 gpg and the bottom quarter below 20 gpg.
What a softener would cost to run
For a household of 3, a 80,000-grain unit covers a week between regenerations. Expect about 1,307 lb of salt a year (33 bags of 40 lb, about $235), 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 $335 a year.
Sizing at 59.9 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 3,594 | 32,000 | 437 lb |
| 2 | 7,188 | 64,000 | 875 lb |
| 4 | 14,376 | twin tank | 1,749 lb |
| 6 | 21,564 | twin tank | 2,624 lb |
Guadalupe County against the rest of New Mexico
Among the 33 New Mexico counties with data, Guadalupe County is number 3 of 33 counting from the hardest. Across the whole country it is harder than 98% of counties.
Softest in New Mexico: Rio Arriba County at 2.3 gpg. Hardest: Chaves County at 116.2 gpg. Closest to Guadalupe County: De Baca County (61.9), San Juan County (55.3), Otero County (31.3).