Ill. Admin. Code tit. 35, § 215.211
a) Except as otherwise stated in subsection (b), every owner or operator of an emission unit subject to Section 215.204(j), (k), (l), or (m) shall comply with those subsections in accordance with the following dates:
b) If an emission unit is not located in one of the nonattainment counties or counties contiguous to nonattainment counties listed below, the owner or operator of the emission unit shall comply with the requirements of Section 215.204(j), (k) or (l) no later than December 31, 1987:
| Bond | Madison |
| Clinton | McHenry |
| Cook | Monroe |
| DeKalb | Montgomery |
| DuPage | Morgan |
| Franklin | Pope |
| Greene | Randolph |
| Jackson | Saline |
| Jersey | Sangamon |
| Johnson | St. Clair |
| Kane | Union |
| Kendall | Washington |
| Lake | Will |
| Macoupin | Williamson |
(BOARD NOTE: Counties are designated as attainment or nonattainment for ozone by the United States Environmental Protection Agency (USEPA). The USEPA noted in its redesignation rulemaking, that it will publish a rulemaking notice on Williamson County's attainment status. (45 Fed. Reg. 21949, May 16, 1983.) Should Williamson County be redesignated as attainment prior to October 31, 1985, it and the counties contiguous to it will be considered deleted from the above list.)
(Source: Amended at 22 Ill. Reg. 11427, effective June 19, 1998)