Gov. Code, § 66455.1

(a) The Department of Water Resources may file with the legislative body of any local agency having jurisdiction, a map or amended map of any territory within one mile on either or both sides of any facility of the State Water Resources Development System, if the department believes a proposed subdivision may have an effect upon any existing or planned future facility of the State Water Resources Development System in that territory. The local agency having jurisdiction shall issue a receipt for the territorial map.

(b) Within five days of a tentative map application being determined to be complete pursuant to Section 65943 for a proposed subdivision located, in whole or in part, within the territory outlined on the territorial map, the local agency shall transmit one copy of the proposed tentative map to the office of the department nearest the subdivision, unless the department specifies a different office on the territorial map filed with the local agency.

(c) Within 15 days after receiving a copy of a proposed subdivision map, the department may make recommendations to the local agency regarding the effect of the proposed subdivision upon the State Water Resources Development System or proposed additions to the system. The local agency having jurisdiction shall consider any recommendations before acting on the tentative map.