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)
2016 14.3 9.9 - 17.5
Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually naturally occurring.
Hardness (ppm)
2016 245 170 - 300
Sum of polyvalent cations present in the water, generally magnesium and calcium, and are usually naturally occurring.
Sodium (ppm)
2016 87.5 78 - 97
Salt present in the water, generally naturally occurring