US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER I: POLLUTION CONTROL BOARDSUBCHAPTER l: AIR QUALITY STANDARDS AND EPISODESPart 243 — AIR QUALITY STANDARDSSubpart B243.12135 Ill. Adm. Code 243.121Particulates (Repealed)Last amended: 1992Year: 2026Length: 6 wordsOfficial source Section 243 Section 243.121 Particulates (Repealed)Previous35 Ill. Adm. Code 243.120Next35 Ill. Adm. Code 243.125