Wastewater Treatment Plant and Administration Building
5072 Benson Road
P.O. Box 5050 94587-8550
Union City, CA 94587-2508
(510) 477-7501 Fax
Normal Business Hours
(510) 477-7500, press extension 1
E-mail Union Sanitary District
If you have an emergency or need immediate assistance, please call (510) 477-7500. We answer our phones 24/7/365.
The ContactUSD email is not for solicitation purposes (see how to do business with USD by clicking here). If you request a response through the ContactUSD email, we will respond within 3 business days. PLEASE NOTE: The ContactUSD email account is NOT monitored on weekends or holidays.
Current Job Openings
Please go to our Employment page to find job openings.