Reclamation Plant No. 1 Administrative Offices 10844 Ellis Avenue, Fountain Valley, CA 92708-7018 (714) 962-2411 Treatment Plant No. 2 22212 Brookhurst Street, Huntington Beach, CA 92646 (714) 962-2411 Business Hours 7:30 a.m. - 5:00 p.m., Monday-Thursday 7:30 a.m. - 4:00 p.m., Friday Plants operate 24 hours a day, seven days a week.