Cal. Water Code § 189.3 — State Water Resources Control Board

(a) The board, in consultation with the regional water quality control boards, and the Division of the State Architect within the Department of General Services shall recommend best design and use practices for storm water and dry weather runoff capture practices that can generally be applied to all new, reconstructed, or altered public schools, including school grounds.

(b) The board shall submit the recommendations to the Governor and the Legislature on or before January 1, 2019.

(c) The board and the State Department of Education shall post the recommendations on their respective Internet Web sites on or before March 1, 2019.

(d) For purposes of this section, “storm water and dry weather runoff capture practices” means practices to control water pollutants, pollutant loads, and water runoff volume exiting a site to the maximum extent feasible by minimizing impervious surface area and controlling runoff from impervious surfaces through infiltration, evapotranspiration, bioretention, treatment, and rainfall harvest.

(e) (1) The reporting requirement pursuant to subdivision (b) shall be inoperative on January 1, 2023, pursuant to Section 10231.5 of the Government Code.

(2) A report submitted to the Legislature pursuant to subdivision (b) shall be submitted in compliance with Section 9795 of the Government Code.