Mich. Admin. Code R. 408.30522b - [Rescinded effective 8/29/2025] Air freezing index
Rule 522b. Table R403.3(2) of the code is amended to read as follows:
Table R403.3(2)
Air Freezing Index for Michigan Locations by County
| 1500 or | 2000 | 2500 | 3000 | 3500 | 4000 |
| Berrien Branch Cass Kalamazoo Macomb Ottawa St. Clair St. Joseph | All counties not listed | Alger Charlevoix Cheboygan Chippewa Crawford Delta Emmet Iosco Kalkaska Lake Luce Mackinac Menominee Missaukee Montmorency Ogemaw Osceola Otsego Roscommon Schoolcraft Wexford | Baraga Dickinson Iron Keweenaw Marquette | Gogebic Houghton Ontonagon |
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.
Rule 522b. Table R403.3(2) of the
Table R403.3(2)
Air Freezing Index for Michigan Locations by County
| 1500 or | 2000 | 2500 | 3000 | 3500 | 4000 |
| Berrien Branch Cass Kalamazoo Macomb Ottawa St. Clair St. Joseph | All counties not | Alger Charlevoix Cheboygan Chippewa Crawford Delta Emmet Iosco Kalkaska Lake Luce Mackinac Menominee Missaukee Montmorency Ogemaw Osceola Otsego Roscommon Schoolcraft Wexford | Baraga Dickinson Iron Keweenaw Marquette | Gogebic Houghton Ontonagon |