Cal. Water Code § 13272.1 : California Water Code — Water Quality — Regional Water Quality Control — Waste Discharge Requirements — List of discharges of MTBE Date: 15 Sep 2016 TEXT PDF Current through the 2016 Legislative Session Each regional board shall publish and distribute on a quarterly basis to all public water system operators within the region of the regional board, a list of discharges of MTBE that occurred during the quarter and a list of locations where MTBE was detected in the groundwater within the region of the regional board. Ca. Water Code § 13272.1 Amended by Stats 2015 ch 303 (AB 731),s 555, eff. 1/1/2016.