Ctr. for Biological Diversity v. Dep't of Conservation

*165The Center for Biological Diversity (Appellant) sought a writ of mandate directing the California Department of Conservation, Division of Oil, Gas, and Geothermal Resources (the Department) to order the *732immediate closure of oil and gas wells injecting fluids into certain underground aquifers. Appellant argued the Department had a mandatory duty to do so under the federal Safe Drinking Water Act (SDWA or the Act; 42 U.S.C. § 330f et seq. ), federal regulations promulgated pursuant to the Act, and a memorandum of agreement executed by the Department setting forth its responsibilities under the…