Pima County Sheriff Tucson area talkgroups are always heard on Simulcast A; and on other sites as needed by system users.
North talkgroups always also heard on North Simulcast. East talkgroups are heard on Mt. Bigelow Site when a deputy is on duty (or otherwise listening) on Mt. Lemmon.
Foothills District is West of 1st Avenue, including Flowing Wells, Casas Adobes, Tortolita, Tucson Mountain Foothills, and Catalina.
Tucson Mountain District is Avra Valley and Picture Rocks. Rincon District is Catalina Foothills, Tanque Verde and Mt. Lemmon.
Vail District is Vail/Rincon Valley and Corona De Tucson.
San Xavier District is unincorporated areas immediately south of Tucson city limits, Drexel Heights, and Three Points.
Green Valley District is unincorporate Sahuarita, Green Valley, and Arivaca.
Ajo District is Ajo.

Sahuarita PD is dispatched by PCSO on South-1. 

The U. S. National Park Service Rangers in Tucson AZ are now on the Pima County Wireless Intergrated Network using two of the Pima County Sheriff's Talk Groups:
TG 18009 (East-1) covers Sabino Canyon which is part of the Coronado National Forest, and Saguaro National Park East.
TG 18024 (North-1) covers the Saguaro National Park West.