How hard is the water in Socorro County, NM?
7.9 grains per gallon
A softener is worth it here.
The median hardness measured in Socorro County, NM is 135 mg/L as calcium carbonate, which is 7.9 gpg. That is hard on the USGS scale. It comes from 19 samples at 17 sites between 1990 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 4.8 and 15 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 7.9 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. Because Socorro 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 3.8 to 96.4 gpg
The softest single sample on record in Socorro County was 65.3 mg/L and the hardest 1,650 mg/L, a 25-fold gap. The top quarter of sites read above 15 gpg and the bottom quarter below 4.8 gpg.
Wells 7.9 gpg, rivers and lakes 9.5 gpg
19 groundwater samples from 17 wells put the median at 135 mg/L. 400 surface samples from 18 sites put it at 163.3 mg/L. In Socorro County the rivers and lakes come out 1.6 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. 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 172 lb of salt a year (5 bags of 40 lb, about $31), 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 $131 a year.
Sizing at 7.9 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 474 | 24,000 | 58 lb |
| 2 | 948 | 24,000 | 115 lb |
| 4 | 1,896 | 24,000 | 231 lb |
| 6 | 2,844 | 24,000 | 346 lb |
Socorro County against the rest of New Mexico
Among the 33 New Mexico counties with data, Socorro County is number 24 of 33 counting from the hardest. Across the whole country it is harder than 42% of counties.
Softest in New Mexico: Rio Arriba County at 2.3 gpg. Hardest: Chaves County at 116.2 gpg. Closest to Socorro County: Grant County (7.8), McKinley County (7), Valencia County (8.9).