CONTACT US HOME ABOUT US DISTRICT NEWS SERVICES BUSINESSES RESIDENTS FINANCIAL INFORMATION PROJECTS & INNOVATIONS BUSINESSES SEWER SERVICES CHARGES DOING BUSINESS WITH DELTA DIABLO SUPPLIER GUIDE SUPPLIER REGISTRATION CURRENT BID/RFP OPPORTUNITIES DELTA DIABLO SURPLUS SEWER PERMITS HAZARDOUS WASTE STREET SWEEPING & STORMWATER PRETREATMENT FOG - FATS, OIL & GREASE Current Bid/RFP Opportunities PLEASE NOTE: Public works projects (construction) are not included on this page. For bid information including planholder lists on public works projects, please contact ENGINEERING SERVICES at 925-756-1900 or check the Projects page of this website. Bids and Requests for Proposal Delta Diablo (District) uses Periscope (formerly BidSync) for most non-public works bids and RFP's. Please register here and you will automatically be notified of upcoming opportunities. Purchasing Contact Information Delta Diablo Purchasing Division 2500 Pittsburg-Antioch Hwy Antioch, CA 94509 925.756.1968 purchasing@deltadiablo.org Search: Go! COPYRIGHT © 2021 DELTA DIABLO 2500 PITTSBURG-ANTIOCH HWY, ANTIOCH CA 94509 TELEPHONE (925) 756-1900 PRIVACY POLICY POWERED BY STREAMLINE | SIGN IN