US lawArizonaRegulationsTitle 18 — Environmental QualityChapter 4 — Department of Environmental Quality - Safe Drinking WaterR18-4-503R18-4-503R18-4-503. RecodifiedRenumberedLast amended: 2004Length: 2 wordsOfficial source Cite as Ariz. Admin. Code § R18-4-503R18-4-503. RecodifiedPreviousR18-4-502NextR18-4-504