The college district serves the 9,240 square miles of. Pima County which includes the rapidly growing Tucson community of 430,000 residents.Fall 2024: Drop-In Hours (for undergraduates only). Drop-in sessions are limited to 15 minutes to help as many students as possible. It may not be reproduced or distributed in any format without written permission of the creating agency. Additional Medicare Advantage requirements. 24. 2, Training project staff!