US lawArizonaRegulationsTitle 18 — Environmental QualityChapter 4 — Department of Environmental Quality - Safe Drinking WaterR18-4-221R18-4-221R18-4-221. RenumberedRenumberedLast amended: 2008Length: 2 wordsOfficial source Cite as Ariz. Admin. Code § R18-4-221R18-4-221. RenumberedPreviousR18-4-220NextR18-4-222