California Code, Government Code - GOV § 53750.6

(1) The higher water usage demand of parcels.

(2) The maximum potential water use.

(3) Projected peak water usage.

(4) Any combination of paragraphs (1) to (3), inclusive.

(b)(1) The incrementally higher costs of water service associated with higher water usage demands, the maximum potential water use, or projected peak water usage may be allocated using any method that reasonably assesses the water service provider's cost of serving those parcels that are increasing potential water usage demand, maximum potential water use, or projected peak water usage.

(2) In addition to any other method consistent with Section 6 of Article XIII D of the California Constitution, the incrementally higher costs of water service associated with higher water usage demand, maximum potential water use, or projected peak water usage may be allocated among customer classes, within customer classes, or both, based on meter size or peaking factors, as those methods reasonably assess the water service provider's cost of serving parcels that increase water usage demand, maximum potential water use, or projected peak water usage.