How do i contact ebmud customer assistance? Call 1-866-403-2683 or send us a message. The Customer Assistance Program (CAP) can pay a portion of the water bill for qualified low-income customers in single-family dwellings and for eligible homeless shelters. EBMUD customers can now make a donation to customers in need through one of two EBMUD Water Lifeline Programs.What are the hours of service for ebmud? Customer service hours: 8 a.m. to 4:30 p.m., Monday through Friday. Water emergency? Call EBMUD any day or time to report a main break or hydrant leak. Redirecting. Please wait...What does ebmud do for the bay? To maintain reliable water supplies, EBMUD manages a vast water and wastewater system through capital improvement projects and ongoing maintenance. What goes down the drain affects the wastewater system and the Bay. Regulations ensure wise water use, safe water supply, proper metering and more. How can we help?Does ebmud have construction bid opportunities? EBMUD's vast water and wastewater infrastructure requires ongoing maintenance and improvement. This page provides information on current and future construction bid opportunities and recently awarded construction contracts. For more information on construction bid opportunities, click on one of the items below.