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Cerro Gordo County has 33 ASC T-121s that are tested automatically on the first Tuesday at 10AM for 3 minutes of Alert. These sirens replaced a variety of others in early 2024 as part of a FEMA grant.
Burchinal, IA
Dougherty, IA
Mason City, IA - 2001s and their T-121 replacements.
Plymouth, IA
Rock Falls, IA
Rockwell, IA
Swaledale, IA - T-121 and Model 2
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