Siren locations I know of with test times.
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Monticello 500AT, just west of the intersection Main street and Fisher street 2nd one located by Railroad and Ohio street (Every Monday at 10AM)
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Hammond IN, City Hall, sewage plant. Both sirens are thunderbolts. (Every Saturday, 11AM)
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Gary IN, City Hall Thunderbolt. (unknown)
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Laotto IN, FD SD-10 (unknown)
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Ligonier IN, ACA screamer, located behind Supermarket, Model 5 located on the FD. (every Saturday of the month at noon)
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Note: all of Illinois sirens are tested on the first Tuesday of every month at 10AM or 10:30AM depending on where you are.

Wilmington IL, P-50

Coal City, IL Model 5/7, 3T22,

Bensenville, IL Cyclones, locations, 1st cyclone: Church Road and Main Street. cyclone 2: Country Club Drive and Foster Ave.

Blue Island, IL Thunderbolt 1003's

Dolton IL, 3T22's, Thunderbeam

Beecher, IL 2001-AC (roundback)

Burrbonias, IL thunderbolt 1003, Thunderbeams, and 3T22's

Braidwood, IL 2 Whelen 3016's

Tinley Park, IL Thunderbolt 1000T's, 1 1003

Frankfort, IL Thunderbolt, located on US 30

University Park, IL Thunderbolt 1003

3T22 in Oak Forest, IL

Model 3 in Country Club Hills, IL

P-10/15 Gardner, IL

P-10/15 Dwight, IL
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Kendallville, IN ACA banshee, located behind US 6 Strip Mall. (First saturday of the month at noon)
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Waukarusa, IN EOWS 612 (every first Saturday of the month at noon)
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Elkhart, IN 7 Thunderbolts (tested every first saturday of the month at noon)
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Griffith, IN model 2 and 2 STH-10's (tested every saturday at 1PM)
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Niles, MI, 3 Allertors (tested March through November on the First Saturday of the month at 1PM)
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Stevensville, MI STL-10 ( first saturday of the month at 1PM, also does a daily noon whistle)
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Cook Nuclear Power Plant Whelens, (every first saturday of the month at
1PM)
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Rolling Prairie, IN model 2 and 2001, Tested every first saturday of the month at 11AM, Model 2 does a daily noon whistle except on Sunday, both sirens sound together for monthly test)
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Michigan City, IN 2T22, Springville, IN T-128, Both located along US 20 (tested every first saturday of the month at 11AM)
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Berrien Springs, MI model 5/7 (unknown)
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Three Oaks, MI STH-10 (daily noon blast except on sunday)
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Lacross, IN model 3/5/7 (no longer used, replaced by a 2001-SRNB)
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Purdue University, MIchigan City, IN Model 5, recently put back in service (test time, first saturday of the month at 11AM)
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Buchanan, MI Model 5/7 (not tested, unknown if it still works)
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Paw Paw, MI Model 3/5/7 (unknown)
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Bertrand TWP, MI model 3 or HOR siren (unknown)
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Centerville, MI model 5 (unknown)
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Colon, MI xT22/mystery siren (unknown)
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Mendon, MI Thunderbolt / 3T22 (first Saturday of the month at noon, May through September)
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Sherewood, MI ACA Screamer (unknown)
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Union City, MI SD-10 (unknown)
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Mattawan, MI 2 EOWS 115's: locations are, 1 is before exit 69 on I-94, the other one is located by the Amtrak line by a township hall, possibly Van Buren County. (daily noon blast)
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Westville, IN FD 2001 and Model 5 (Every first Saturday of the month at 11AM) Model 5 does a noon blast, unknown if model 5 and 2001 sound together for monthly test.
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San Pierre, IN Model 2 (daily noon blast, fire calls)
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North Judson, IN Darley Champion 5HP siren on water tower (daily noon blast)
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Continuing from above...
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Merrilville, IN Whelen Vortex with fin (unknown)
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Lowell, IN Whelen Vortex with fin, 2001-130 (unknown)
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Lake Station, IN STL-10 and a Fedelcode 20 (unknown)
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St. John, IN model 5 (unknown)
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Argos, IN Sentry Defender (Every Saturday at noon)
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Muncie, IN Banshee 110 (unknown)
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Lafontaine, IN Model 20 (unknown)
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Lakeville, IN Modified Darley Champion (daily noon blast)
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Kouts, IN Sterling (no longer used, replaced by a
T-128 and a 2001-130)
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Cromwell, IN Model 5 and a Fedelcode/Darley model 2 (unknown)
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Walkerton In- Model 5 (noon blast except on Sunday)
------------------------------------------------------Dowogiac, MI- 3 vortexes (tested 3rd Saturday of the month at noon)
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If you guys know of any test times that are marked as unknown, then please let me know.
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Last updated on Sunday September 25, 2011