California Senate Republicans are urging Governor Gavin Newsom to veto legislation concerning how water districts calculate tiered water rates, saying the measure could affect the application of Proposition 218. Assembly Bill 2180, authored by Assemblymember Shirley Weber, D-San Diego, was the subject of a letter from Senate Republicans asking Newsom to reject the bill. The legislation comes as the California Supreme Court considers a case involving tiered water rates charged by water agencies. The case, Dreher v. City of Los Angeles Department of Water and Power, concerns whether water districts are complying with legal requirements governing tiered water rates. Senator Steven Choi, R-Irvine, said Proposition 218, approved by California voters in 1996, was intended to provide protections for property owners and ratepayers from certain government-imposed fees and charges.