Thanks, nice work. I'm schooling up my digital scanning so it's all pretty interesting. I've been a passive scanner nut for 50 years, since the crystal days.
I hear you on scanning since the crystal days. Hearing the neighbor's crystal scanner is what got me into this mess back in early 90's. I've always been a few years behind the trends just because NorCal has always been analogous to VHF-Analog, much like your sliver of coast. The metropolis of Redding had 800Mhz and that was fancy back then. Now with National Parks, BRICS and CRIS and some Fed 3 letters agencies I get to spool up on P25, TDMA/FDMA, simulcast, etc. which is old news to many other members here haha.
On any channel in your scanner that you're hearing that digital hash noise, that's P25 traffic being passed. It's a distinctive sound you'll learn to recognize. I submitted just the Eureka Fire Dispatch channel since that's all I could confirm during the time I was there. If you notice the fire tac channels or any other channels with that noise on it, can you submit those changes to the database, and/or post them here so someone can? If you have a P25 scanner, try programming each of those fire tacs twice, the first one being digital-only with NAC search, and the second being analog-only.
Does Eureka Fire play with the county well? There was a garage explosion and heavy residential fire in Arcata when I was there, and their 2nd and 3rd alarm kept pulling in more distant departments in the county but no Eureka Fire (that I recall) or CalFire resources. Thinking of interoperability where county departments have or don't have P25 capable radios to roll into Eureka if mutual aid was needed, if those fire tacs were indeed digital like dispatch. Even with dispatch/incident command being P25 and incoming mutual aid resources not getting the situational awareness as they respond in. Heaven forbid a 6+ hits over there and y'all can't talk amongst yourselves waiting for the 3hr response from Redding and north bay.