The California Court of Appeal, Fourth Appellate District, Division Three has shot down the appeal of a resident of Laguna Niguel that claimed the Metropolitan Water District (MWD) of Southern California damaged her copper piping. According to the court opinion filed by Associate Justice Raymond J. Ikola, plaintiff Lisa Williams filed a lawsuit claiming MWD added a chemical to the tap water that damaged her copper pipes. The opinion states that the chemical was authorized by regulation and that “it is undisputed that the water districts complied with all statutory and regulatory standards.”