California Code, Water Code - WAT § 75594

Except as provided in section 75595, any ground water charge in any year shall be established at a fixed and uniform rate for each acre-foot for water other than agricultural water which is not less than three times nor more than five times the fixed and uniform rate established for agricultural water.  However, any groundwater charge in any year for water other than agricultural water used for irrigation purposes on parks, golf courses, schools, cemeteries, and publicly owned historical sites may be established at a fixed and uniform rate for each acre-foot which shall not be less than the rate established for agricultural water, nor more than the rate established for all water other than agricultural water.