US lawArizonaRegulationsTitle 18 — Environmental QualityChapter 4 — Department of Environmental Quality - Safe Drinking WaterR18-4-255R18-4-255R18-4-255. ReservedReservedLength: 2 wordsOfficial source Cite as Ariz. Admin. Code § R18-4-255R18-4-255. ReservedPreviousR18-4-254NextR18-4-256