1 000 bacteria per 100 millilitres.

1 000 bacteria per 100 millilitres. These interim requirements became applicable on 1 January 2009 for vessels constructed after that date and having ballast capacities of less than 5 000 metric tonnes. There are progressively later effective dates through 1 January 2016 for vessels constructed before 1 January 2009.

The final regulations, which become effective after 1 January 2020, require that ballast water discharged into waters under California’s jurisdiction be treated to contain no (zero) detectable, living organisms. Until the above-described requirements become effective, ballast water management relies primarily on ballast exchange.