What is a LEMSA?

The County of San Diego Emergency Medical Services (EMS) division is part of County Fire, which falls under the Public Safety Group. San Diego County Fire is the “local EMS agency,” or LEMSA, as defined in California law.

State of California Emergency Medical Services Law Health & Safety Code Section 1797.200

California's EMS Act authorizes each county to develop an EMS program and to designate a local EMS agency (LEMSA) that oversees the delivery of EMS within that geographic area:

http://emsaac.org/about/lemsas