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

Monday to Friday: 8:00am - 5:00pm
Fri: 8:00am - 5:00pm
Weekends/Holidays: Closed

Route Information: 1-925-754-4040
Lost and Found: 1-925-754-6622
Customer Service: 1-925-754-6622
Administrative Office: 1-925-754-6622
Fax: 1-925-757-2530
Paratransit Scheduling: 1-925-754-3060
Accessible Services Department: 1-925-706-4398
LIFE (previously Means Based Fare Program) 1-925-706-4399
Regional Route Information: 511
Teletype: TTY 711

Send Us Your Comments

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

Thank you for submitting your comments. Customer service is of the utmost importance to Tri Delta Transit. If you selected that you would like a response, a customer service representative will contact you within 7-12 business days from the day after the comment is received. You may also be contacted if we have questions or need more information.

If you are unable to access the comment forms online, you may also leave comments the following ways:

  • Call us at 1-925-754-6622 and ask to leave a comment. You will be transferred to the customer service department.
  • Visit our administrative offices at 801 Wilbur Ave, Antioch
  • Email us at with complete details
Information on this website can be provided to you in a variety of accessible formats in addition to the translation feature, such as diskette/CD, audio tape, braille, or large print. If you need any written information provided to you in one of these accessible formats, please contact us at 1-925-754-6622 and ask for the Customer Service Department.