Infographic North American Emission Control Area Share ECAs are established by the IMO to limit emissions from ships in coastal areas. In North America’s ECA, ships must burn fuel or scrub exhaust to emit a maximum of 0.1% sulphur content since January 2015. Published March 25, 2020 | Last modified on February 16, 2024 You may also be interested in Article Navigating the St. Lawrence: Challenging Waters, Rich History and Bright Future Microsite Who Pays for an Oil Spill Microsite Air Pollution