California tightens discharge restrictions for its marine waters

This restriction, which took effect on 28 March, applies to large passenger vessels of 300gt and over which have berths or overnight accommodation for passengers, and large oceangoing vessels of 300gt and over, including private, commercial, government or military vessels equipped with a holding tank with remaining capacity or containing sewage generated prior to entering the state’s waters.

In response to an application from California, the US Environmental Protection Agency (EPA) established this regulation under the US Clean Water Act Section 312 (f) (4) (A) authorities. EPA estimates the rule will prohibit the discharge of over 22million of the 25million gallons of treated sewage that large vessels could otherwise legally discharge into the state’s waters each year. According to EPA, even treated sewage can contain pathogens, nutrients and other contaminants which affect human and environmental health, and economic productivity.