"The variety of fires they respond to are tremendous, whether it is a simple trash fire that someone lit behind one of our businesses or a wild land fire or in the case of a structure fire where somebody may have purposely lit that structure," said Chief Dan Munsey.
The dogs, known as detection canines, are trained to sniff out minute traces of accelerants and ignitable liquids, such as gasoline or lighter fluid.
On Thursday, the department introduced its newest member: A 2-year-old yellow Labrador Retriever named Ginnie.
According to SBFPD, Ginnie and her handler, Assistant Fire Marshal Brian Headley, recently returned from a 4-week training.
Ginnie joins K-9 Dinty, a 5-year-old black Labrador Retriever.
The two animals are currently the only arson canines in San Bernardino County and two of six teams in California.
"We do have electronic instruments, but the dog is more accurate," said fire investigator Shawn Reiss. "His nose is 10 times more effective. He has 200 to 300 million receptors when he sniffs. He is going to find it."
Munsey said investigators responded to 670 fires last year and estimates they'll work more than 800 this year.
The department was the recipient of the State Farm Arson Dog Training Scholarship, which gave them $25,000 to fund the program.