US lawArizonaRegulationsTitle 18 — Environmental QualityChapter 4 — Department of Environmental Quality - Safe Drinking WaterR18-4-227R18-4-227R18-4-227. RepealedRepealedLast amended: 1991Length: 2 wordsOfficial source Cite as Ariz. Admin. Code § R18-4-227R18-4-227. RepealedPreviousR18-4-226NextR18-4-228