US lawIllinoisRegulationsTitle 35 — ENVIRONMENTAL PROTECTIONCHAPTER II: ENVIRONMENTAL PROTECTION AGENCYPart 380 — PROCEDURE FOR THE CERTIFICATION OF OPERATORS OF WASTEWATER TREATMENT WORKS380.APPENDIX35 Ill. Adm. Code 380.APPENDIXA Map of Illinois SectionsLast amended: 1985Year: 2026Length: 7 wordsOfficial source Section 380.APPENDIX A Map of Illinois SectionsNext35 Ill. Adm. Code 380.APPENDIX A