Cal. Pub. Res. Code § 40061

(a) Notwithstanding Section 40059, every local agency which does not directly charge residential households a fee for the collection, transportation, and disposal of solid waste and every local agency which directly charges residential customers a fee which represents less than 90 percent of the average cost of collecting, transporting, and disposing of residential solid waste shall, at least once every three months, arrange to inform all residential households of all of the following:
1. (1) The average monthly volume of solid waste produced by each residential household.
2. (2) The total estimated monthly cost to the local agency to collect, transport, and dispose of all solid waste produced by residential households.
3. (3) The average monthly cost to the local agency to collect, transport, and dispose of solid waste produced by each residential household.
(b) For the purposes of this section, “residential household” means those single and multifamily residential units which are not charged a periodic fee for the collection, transportation, and disposal of solid waste or which are assessed a periodic fee which represents less than 90 percent of the local agency’s total cost of providing these services.
(c) The notification provided under subdivision (a) may, not more than twice in any calendar year, be made by publication in a newspaper of general circulation in the county in which the local agency is located.
(d) Unless notification is made by publication, when possible, the notification provided under subdivision (a) shall be distributed by each local agency to residential households in a manner that results in no distribution costs to the local agency in excess of distribution costs otherwise incurred for other purposes.