The average PM2.5 in the restaurants of the 14 cities prelaw and postlaw in Michigan
| Cities | Prelaw (μg/m3) | Postlaw (μg/m3) |
|---|---|---|
| Grand Rapids | 103.1 | 7.5 |
| Kalamazoo | 142.6 | 10.9 |
| Lansing and East Lansing | 81 | 7.4 |
| Midland | 207 | 4.9 |
| Saginaw | 149.7 | 3.4 |
| Ann Arbor | 133 | 15.9 |
| Detroit | 78.6 | 18.7 |
| Flint | 108.6 | 15.2 |
| Novi | 178.3 | 8.8 |
| Marquette | 160.1 | 6.8 |
| Sault Ste Marie | 117.3 | 38.2 |
| Traverse City | 111.1 | 8.6 |
| West Branch | 68.9 | 6.5 |
| Minimum Value | 9 | 1.6 |
| Maximum Value | 601 | 182 |
| Mean, all (SD) | 126 (109)* | 11.8 (22.9)* |
| Median | 90.8 | 6.7 |
| Geometric mean | 88.5 | 7.4 |
| Count | 78 | 77 |
*p Value: <0.0001.