US lawWashingtonRegulationsTitle 173 — ECOLOGY, DEPARTMENT OFChapter 173-228 — VESSEL SEWAGE NO DISCHARGE ZONES173-228-010WAC 173-228-010WAC 173-228-010. PurposeLast amended: 2018Year: 2026Length: 14 wordsOfficial source The purpose of this chapter is to establish no discharge zones for vessel sewage.NextWAC 173-228-020