US lawIllinoisRegulationsTitle 77 — PUBLIC HEALTHCHAPTER I: DEPARTMENT OF PUBLIC HEALTHSUBCHAPTER r: WATER AND SEWAGEPart 930 — SURFACE SOURCE WATER TREATMENT CODE930.ILLUSTRATION77 Ill. Adm. Code 930.ILLUSTRATIONA Slow Sand Filter Water Treatment PlantLast amended: 2003Year: 2026Length: 11 wordsOfficial source Section 930 Section 930.ILLUSTRATION A Slow Sand Filter Water Treatment PlantPrevious77 Ill. Adm. Code 930.EXHIBIT ANext77 Ill. Adm. Code 930.ILLUSTRATION A