Scrubbers not allowed in California
The California Air Resources Board (CARB) has announced that the Californian regulation for ocean-going ships, which was adopted in 2008 and still is in effect, requires the use of low-sulphur (max 0.1%) distillate fuels by vessel main engines, auxiliary engines and auxiliary boilers within 24 nautical miles of the California coastline, and thus does not allow compliance through the use of scrubbers.
Source: Safety4sea.com, 27 January 2020.