There's only two licenses showing on the FCC database for 158.8125.
One is Merced County, and it's a repeater input, so unlikely you'd hear CW ID on it.
The other is the State and appears to be part of CRIS. It's also a repeater input and unlikely you'd hear CW ID on it.
158.805 or 158.820 are the two adjacent frequencies in the public safety pool.
158.805 has SLO county on it, as WTP mentioned. There is a repeater output on that frequency on Cuesta Peak, as well as one north of Cambria. Plus, all of these:
ULS License - Public Safety Pool, Conventional License - WRUY876 - SAN LUIS OBISPO, COUNTY OF - Locations Summary
158.820 is being used by Paso Robles and the State of California, but as a repeater input, so again, unlikely you'd hear CW ID on that.