This is my 'official' thread for sirens in Idaho, to be updated when I find new ones or create more media of ones that have already been found.
I decided to just do a list, so these are alphabetically ordered by place name.
Aberdeen Fire Department, STH-10, most likely inactive: pics
Ammon, STH-10, located at a water building near McCowen Park and an elementary school, connected but inactive: pics
Ashton Police Department, Model 5: pics
Blackfoot Fire Department, at the smaller water tower, STH-10, acts as a noon whistle: pics vid
Burley Fire Department Federal Type B Dual-Head: pics
Dubois, across from the school: pics
Firth, at the water tower: pics
Hansen Fire Department, Model 2: pics
Idaho Falls system - Coming back from a long inactive period?
Bonneville County Courthouse, WPS-3016: pics vid
Bonneville County Fire District Dispatch (former Station 3): pics
Bonneville County Fire District Station #2, WPS-2020: pics
Eastern Idaho Technical College, WPS-2020: pics
Idaho Falls Wastewater Treatment Plant, WPS-2705: pics
Iona Fire Department/City Park, Model 2: pics
Kimberly, on the water tower behind the public library, Model 2: pics
Menan, Central Fire District Station #4, Model 2 (coded?): pics
Montpilier City Hall, Sterling M-10 16/16: pics
Newdale Fire Department, 2x Model L: pics
Pallisades Fire Department, GCS Model 2 or 3: pics
Paris Fire Garage, Darley 2V8: pics
Pocatello Simplot Plant WPS-2805, plant owned: pics
Rexburg-Madison County Fire/EMS ACA Screamer, disconnected: pics
Richfield, City Maintainence Building, Darley Helmet Siren: pics
Rigby Town Hall (former Fire Department) Model 5, disconnected: pics
Ririe Town Hall, Federal Type B Dual-Head: pics vid
Shoshone Water Tower, FS Model 5 and Darley Model 5, One or both go off for noon and 10PM blasts pics
St. Anthony, previously a National Guard armory, Darley Champion: pics
Swan Valley Fire District #2 FS SelecTone+Beacon: pics
Tetonia, Teton County Fire District, Model EG and 2x Model A, working, rarely used: pics
Ucon Fire Department/Maintenance Garage, Model 5: pics
Victor, Teton County Fire District, Model 5T, disconnected: pics
And finally, a nice link to the Dropbox gallery that hosts all of the original images.