US lawWashingtonRegulationsTitle 173 — ECOLOGY, DEPARTMENT OFChapter 173-154 — PROTECTION OF UPPER AQUIFER ZONES173-154-030WAC 173-154-030WAC 173-154-030. AuthorityLast amended: 1985Year: 2026Length: 19 wordsOfficial source This chapter is promulgated by the department of ecology pursuant to chapters 18.104 , 43.21A, 90.44 and 90.54 RCW.PreviousWAC 173-154-020NextWAC 173-154-040