Contact Us

We love to hear from our customers.
Please give us a call or email us and let us know how we are doing.


Tri Delta Transit
801 Wilbur Avenue
Antioch, CA 94509

Administrative Office Hours

Mon-Thurs: 7:00am - 6:00pm
Fri: 8:00 am - 5:00pm
Sat/Sun: Closed

Route Information: (925) 754-4040
Lost and Found: (925) 754-6622
Customer Service: (925) 754-6622
Administrative Office: (925) 754-6622
Fax: (925) 757-2530
Dial-a-Ride: (925) 754-3060
Regional Route Information: 511
Teletype: TTY 925-754-3695
Customer Comment Form: Click here to send us your comments/Complaints
Compliment Form: Click here to send us your Commendations
Suggestion Form: Click here to send us your Suggestions
Information Request Form: Click here to request information