These are the freqs that were historically part of the Fire and Police Radio Services before the PF, PL, PS, PP and PH pools were merged into the single pool PW. While any PW freq can now be assigned there is still some tendency for these freqs to stay as Fire assignments. Also shown is the nominal assignment types. These didn't always end up as such, famously 153.770 was a repeater in Chicago and 153.890 was a repeater in Lake County IL.
These assignments predated the 7.5 KHz. interstitials and even before they were officially merged it was common for interservice sharing to occur. Also, Local Government channels were often co-opted by police or fire operations.
153.770 (Mob)
153.830 (10 watts)
153.890 (Mob)
153.950 (Mob)
154.010 (Mob)
154.070
154.130
154.145
154.160
154.175
154.190
154.205
154.220
154.235
154.250
154.265 (Intersystem)
154.280 (Intersystem)
154.295 (Intersystem)
154.310
154.325
154.340
154.355
154.370
154.385
154.400
154.415
154.430
154.445
Later 150.775, 150.790 and 150.805 were commonly assigned to Fire use but I think officially they were actually EMS channels in the PS category.
Police assigned channels included the following:
154.650 (Mob)
154.665 (State Use)
154.680 (State Use)
154.695 (State Use)
154.710 (Mob)
154.725
154.740
154.755
154.770 (Mob)
154.785
154.800
154.815
154.830 (Mob)
154.845
154.860
154.875
154.890 (Mob)
154.905 (State Use)
154.920 (State Use)
154.935 (State Use)
154.950 (Mob)
155.010
155.070
155.130
155.190
155.250
155.310
155.370 (Intersystem in some parts of the midwest)
155.430
155.445 (State Use)
155.460 (State Use)
155.475 (Intersystem)
155.490
155.505 (State Use)
155.520
155.535
155.550
155.565
155.580
155.595
155.610
155.625
155.640
155.655
155.670
155.685
155.700
155.730
155.790
155.850 (Mob)
155.910 (Mob)
155.970 (Mob)
156.030 (Mob)
156.090 (Mob)
156.150 (Mob)
156.210
158.730
158.790
158.850 (Mob)
158.910 (Mob)
158.970 (Mob)
159.030 (Mob)
159.090
159.150
159.210
There were also a smattering of PS (Medical and school buses etc.), highway, forestry and Local Government assignments.