by Amjad M.J. Umari ... [and others] ; prepared in cooperation with the California Regional Water Quality Control Board-Lahontan Region and the Mojave Water Agency
by Robert Anders ... [and others] ; in cooperation with the Water Replenishment District of Southern California and the County Sanitation Districts of Los Angeles County
by Jennifer L. Shelton ... [and others] ; prepared in cooperation with the California State Water Resources Control Board, National Water-Quality Assessment Program
by Miranda S. Fram ... [and others] ; prepared in cooperation with the Los Angeles County Department of Public Works and the Antelope Valley-East Kern Water Agency