Learn About Water Hardness

Each Year, the Santa Fe Irrigation District completes and distributes to its customers a Water Quality Report. A frequently asked question is "How Hard is My Water?"

Here is a summary of the water hardness for SFID customers:
-ppm: parts per million = one part substance per million parts water
Substance
​(unit of measure)
 Year Sampled
 Amount Detected
 Range: low / high
 Typical Source
Hardness (grains per gallon)
 2018 14.6 12.3 - 16.9
 Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually naturally occurring.
Hardness (ppm)
 2018 250 210 - 290
 Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually naturally occurring.
Sodium (ppm)
 2018 104 87 - 120
 Salt present in the water, generally naturally occurring