Sirens in Rock County are tested on the 1st Wednesday of each month at 12:05 PM from April to October
Beloit
Clinton - Inactive Soundmaster and 2 2001s.
Edgerton - Decot, 2 T-128s, RM-127 and Banshee.
Evansville, WI
Janesville
Milton
Federal Signal Thunderbolt 1003 - Rock River Heritage County Park or 42°45'28.3"N 89°06'25.4"W. The siren is on the ground, originally attached to the shed before it got taken down. This siren also wasn't part of the county. The shop vac was used as the blower. The serial number seems to be B400D1. These pictures were taken on 4/8/25 by Jaiden Lawver (©Sirens of Rock County).