2009 California Health and Safety Code - Section 25965 :: Chapter 12.5. Water Heaters

25965.  A warning label shall be affixed near the thermostat of all
new water heaters to be sold in the state for residential use. This
warning shall read as follows:
   "Warning: Setting of the water heater thermostat in excess of 130
degrees Fahrenheit or 54 degrees centigrade may cause accidental
scalding or other injury, particularly to children or elderly
persons."
   The Legislature does not intend by the enactment of this section
to impose any duty on public utilities to affix this warning label or
otherwise warn their customers relative to existing water heaters.