There is a LOT to listen to, both within and without public safety. As noted, CHP is about the only LE left, some LA area PD's are still clear and from your area you may get them but that's about it. Aside from local Fire and EMS, there are State and Federal agencies and departments all over that can be interesting listening. State parks, CalFire, Dept of Fish and Wildlife, even Department of Water resources. Also Caltrans and SoCal Edison can be fun listening especially during road work or storms/ fires. Federally, you have BLM, NPS, National forests.
There is also airband and military monitoring as well, and you'd be surprised how little- routine- military stuff is clear.
Past that, and some of the most fun listening for me personally is general business listening. Look RR and find the FCC licenses in your area, dial them in and sit back and see what comes up. You'd be surprised the wild things that you will hear from local stores and other businesses. Also, a lot of security is in the business band range. It's not law enforcement per se, but it does make for interesting listening as well and you might even hear some excitement well before you'd hear any law dispatch on it.
Trust me, there is no shortage of things to listen to. Don't let the anti encryption crowd take you down too low. The only real hang-up is you might want to invest in DMR and NXDN to hear the full range of possibilities.
Hope this helps somewhat.