The purpose of this report is to help policy makers and stakeholders understand results, limitations and advantages of the ship emissions estimations that will form the basis of a Mexican ECA designation proposal. STEEM has been used to support successful ECA designation applications to the IMO by the U.S. and Canada. Mexican officials and stakeholders should be confident that the results presented here are robust. The potential for substantial reductions in future ship emissions shown in this report means that an ECA would be expected to have considerable environmental and human health benefits. If Mexico decides to pursue an ECA designation, the evidence contained in this report can help support a credible proposal to the International Maritime Organization (IMO).

• U.S.-Mexico Cooperation on Reducing Emissions from Ships through a Mexican Emission Control Area: Development of the First National Mexican Emission Inventories for Ships Using the Waterway Network Ship Traffic, Energy, and Environmental Model (STEEM) (PDF)(41 pp, 4 MB, 05/15, EPA-160-R-15-001)