Cal. Wat. Code § 60017
"Production" or "producing" means the extraction or extracting of ground water, by pumping or any other method, from shafts, tunnels, wells (including, but not limited to, abandoned oil wells), excavations, or other sources of such ground water, for domestic, municipal, irrigation, industrial, or other beneficial use, except that such terms shall not mean or include the extraction or extracting of ground water incidentally produced with oil in the production of oil or gas nor the extraction or extracting of ground water incidentally produced in a bona fide mining operation or in the bona fide construction of a tunnel for railroad, highway, aqueduct, pipeline, or other useful purpose (except the production of ground water for use or sale) unless the ground water so extracted shall be used or sold by the producer for domestic, municipal, irrigation, industrial, or other beneficial purpose.
Ca. Water Code § 60017