TITLE 35: ENVIRONMENTAL PROTECTION SUBTITLE B: AIR POLLUTION CHAPTER I: POLLUTION CONTROL BOARD SUBCHAPTER l: AIR QUALITY STANDARDS AND EPISODES PART 243 AIR QUALITY STANDARDS The General Assembly's Illinois Administrative Code database includes only those rulemakings that have been permanently adopted. This menu will point out the Sections on which an emergency rule (valid for a maximum of 150 days, usually until replaced by a permanent rulemaking) exists. The emergency rulemaking is linked through the notation that follows the Section heading in the menu. View Entire Part SUBPART A: GENERAL PROVISIONS Section 243.101 Definitions Section 243.102 Scope Section 243.103 Applicability Section 243.104 Nondegradation (Repealed) Section 243.105 Air Quality Monitoring Data Influenced by Exceptional Events Section 243.106 Monitoring (Repealed) Section 243.107 Reference Conditions Section 243.108 Incorporations by Reference SUBPART B: STANDARDS AND MEASUREMENT METHODS Section 243.120 PM10 and PM2.5 Section 243.121 Particulates (Repealed) Section 243.122 Sulfur Oxides (Sulfur Dioxide) Section 243.123 Carbon Monoxide Section 243.124 Nitrogen Oxides (Nitrogen Dioxide as Indicator) Section 243.125 Ozone Section 243.126 Lead Section 243.APPENDIX A Rule into Section Table (Repealed) Section 243.APPENDIX B Section into Rule Table (Repealed) Section 243.APPENDIX C Past Compliance Dates (Repealed) Section 243.TABLE A Schedule for Flagging and Documentation Submission for Data Influenced by Exceptional Events for Use in Initial Area Designations (Repealed)

AUTHORITY: Implementing Sections 7.2 and 10 and authorized by Section 27 of the Environmental Protection Act [415 ILCS 5/7.2, 10, and 27].

SOURCE: Adopted as Chapter 2: Air Pollution, Part III: Air Quality Standards, in R71-23, filed and effective April 14, 1972; amended in R80-11, at 6 Ill. Reg. 5804, effective April 22, 1982; amended in R82-12, at 7 Ill. Reg. 9906, effective August 18, 1983; codified at 7 Ill. Reg. 13630; amended in R91-35 at 16 Ill. Reg. 8185, effective May 15, 1992; amended in R09-19 at 35 Ill. Reg. 18857, effective October 25, 2011; amended in R13-11 at 37 Ill. Reg. 12882, effective July 29, 2013; amended in R14-6 at 37 Ill. Reg. 19848, effective November 27, 2013; amended in R14-16 at 38 Ill. Reg. 12900, effective June 9, 2014; amended in R15-4 at 39 Ill. Reg. 5434, effective March 24, 2015; amended in R16-2 at 40 Ill. Reg. 4906, effective March 3, 2016; amended in R17-1 at 41 Ill. Reg. 1121, effective January 23, 2017; amended in R17-10 at 41 Ill. Reg. 13413, effective October 23, 2017; amended in R18-15 at 42 Ill. Reg. 9308, effective May 29, 2018; amended in R19-6 at 43 Ill. Reg. 3034, effective February 19, 2019; amended in R19-14/R20-3/R20-11 at 44 Ill. Reg. 14223, effective August 18, 2020; amended in R21-1 at 45 Ill. Reg. 337, effective December 17, 2020; amended in R22-8 at 46 Ill. Reg. 9068, effective May 18, 2022; amended in R23-15 at 47 Ill. Reg. 14814, effective October 5, 2023; amended in R24-15 at 48 Ill. Reg. 8097, effective May 16, 2024; amended in R25-7 at 48 Ill. Reg. 17597, effective November 21, 2024.