US lawArizonaRegulationsTitle 18 — Environmental QualityChapter 4 — Department of Environmental Quality - Safe Drinking WaterR18-4-509R18-4-509R18-4-509. RecodifiedRenumberedLast amended: 2004Length: 2 wordsOfficial source Cite as Ariz. Admin. Code § R18-4-509R18-4-509. RecodifiedPreviousR18-4-508NextR18-4-601