US lawIllinoisRegulationsTitle 77 ā PUBLIC HEALTHCHAPTER I: DEPARTMENT OF PUBLIC HEALTHSUBCHAPTER n: RECREATIONAL FACILITIESPart 820 ā SWIMMING FACILITY CODE820.APPENDIX A77 Ill. Adm. Code 820.APPENDIX AA IllustrationsLast amended: 2013Year: 2026Length: 17 wordsOfficial source Section 820 Section 820.APPENDIX AĀ Ā Illustrations Section 820.ILLUSTRATION JĀ Ā Installation of a Pressure Diatomaceous Earth Filter SystemPrevious77 Ill. Adm. Code 820.APPENDIX ANext77 Ill. Adm. Code 820.APPENDIX A