Utilities > Water >
Water Treatment > Water Quality
hard is the City of San Luis Obispo's water? In the City, the
water hardness is 200 to 370 mg/l (11.7 to 21.6 grains per gallon).
The moderate hardness of the City's water does not pose a health
problem. Hardness in water does tie up detergents and soap so
that they will not lather. The harder the water, the more soap
must be used to clean. Soft water, on the other hand, can be
more corrosive to plumbing. Groundwater from City wells is generally
"harder" than the surface water from the lakes.
the City add fluoride to the water supplied to residents? Yes.
The City has been fluoridating our water since August 3, 1954,
following an advisory vote of the citizens in the City. Fluoride has
been found to be an effective tool in preventing dental problems when
used in optimal concentrations.
view our annual Water Quality/Consumer Confidence Reports:
Contact: Dean Furukawa, Water Treatment Plant Supervisor,
Phone - 781-7566
E-mail - firstname.lastname@example.org