Wow dude, nice job! This is the most complete map of NY I've ever seen. But I just remembered, I was supposed to give you some locations that you missed, wasn't I? My bad. I'll do that now. Having lived in NY for most of my life, I know where quite a few hidden gems are. Feel free to use the two maps in my signature for sirens in Ulster and Broome counties. You actually got most of them, but I noticed a few that were absent. As for other sirens that aren't in those counties:
GCS Model 5 @ Clermont FD
Abandoned Federal Model B @ Letchworth Village power plant
Federal Model 7 @ Mountainville FD
Federal Model 2 @ Port Jervis FD Co. #6
Federal STH-10 @ Port Jervis train station
Sterling Little Giant @ Woodbourne FD
Federal 3T22 @ Loch Sheldrake FD (you actually have this one, but it's listed as a mystery siren)
Federal STH-10 @ Arkville FD
Whelen WPS-2803 @ Andes FD
Federal xT22 @ Delhi FD/PD (in the tower; horns are removed, but if you look closely you can see them stacked nearby)
Federal STH-10 @ Lanesville FD
Federal Model 2 @ West Kill FD
Darley Model 2 @ Maplecrest FD/town hall (again, you have this one but it's listed as a mystery siren)
Abandoned Fedelcode Model 5/7 @ old Catskill cement plant
Sterling 2V8 @ Brisben FD (another one marked as a mystery siren)
Three sirens in one place! I know you have the Model 7 and the T-128, but the Thunderbolt 1003 is still there. Not sure if you wanted to include it or not, since I assume they're eventually taking it down in favor of the T-128. I noticed you did include another old T-bolt in the Nine Mile nuclear system though. Not sure if all the locations still have the T-bolts or not. Fun fact though: I actually got to tour that nuclear plant when I was a student. It was super cool. We got to walk right next to the steam turbines and even the pit for the spent fuel rods. Crazy amount of security too; we had to go through a whole bunch of checkpoints and there were guards with assault rifles everywhere. Somewhat off-topic, but looking at those sirens reminded me of that time. We passed right by those three sirens on the way there.
Anyway, that's about all I can think of right now. There were a couple other locations, including a Sentry F-2 which is pretty unique 'cause those aren't often used as outdoor sirens, but unfortunately I can only remember the general area, not the exact location. But if I do remember, or if I think of some other ones, I'll be sure to let you know. I gotta say, I do miss living up there. NY is a goldmine for old and weird sirens, and there's quite a lot of diversity too.