How hard is the water in Conejos County, CO?

3.4 grains per gallon

You do not need a softener here.

The median hardness measured in Conejos County, CO is 57 mg/L as calcium carbonate, which is 3.4 gpg. That is soft on the USGS scale. It comes from 9 samples at 9 sites between 1990 and 2026, 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 3.3 and 3.4 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

You can skip the softener. At 3.4 gpg the most a softener would fix is the odd water spot. If a salesperson in Conejos County says otherwise, ask to see their reading in grains per gallon and compare it with this one.

More on when a softener is not worth it.

From 3.2 to 4.5 gpg

The softest single sample on record in Conejos County was 55.1 mg/L and the hardest 76.9 mg/L, a 1-fold gap. The top quarter of sites read above 3.4 gpg and the bottom quarter below 3.3 gpg.

Wells 3.4 gpg, rivers and lakes 2.9 gpg

9 groundwater samples from 9 wells put the median at 57.4 mg/L. 1,658 surface samples from 154 sites put it at 50 mg/L. In Conejos County the wells come out 0.5 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. The two sources are close, so the county figure should hold whichever one your tap is on.

Conejos County against the rest of Colorado

Among the 63 Colorado counties with data, Conejos County is number 62 of 63 counting from the hardest. Across the whole country it is harder than 23% of counties.

Softest in Colorado: Larimer County at 0.4 gpg. Hardest: Mesa County at 143.7 gpg. Closest to Conejos County: Grand County (4.2), Rio Blanco County (4.3), Chaffee County (4.3).