California Code, Government Code - GOV § 25829

The San Mateo County Board of Supervisors may acquire, construct, reconstruct, alter, enlarge, lay, renew, replace, maintain, and operate dump sites, incinerators, garbage disposal systems, sewers, drains, septic tanks, sewerage collection, outfall and treatment works and other sanitary disposal systems, and storm water drains and storm water collection, outfall and disposal systems for the disposal of combustible or noncombustible garbage or rubbish, for the treatment and disposal of sewage or storm waters, or any of them.

The board may make and enforce all necessary and proper regulations for the use of disposal facilities not in conflict with the Constitution and the laws of the state. The board may collect compensation from private or public parties for the right to dump or for the use of any dump site, incinerator, or other disposal plant, or system or for the disposal of garbage, rubbish, sewerage or storm waters brought to any dump site, incinerator, or other disposal plant. It may restrict the use of the facilities to the inhabitants of the county.

This article does not limit the right of the county to buy, lease, or otherwise acquire and operate a dump site, incinerator or other disposal plant or system in another county for the disposal of garbage, rubbish, sewerage or storm waters.