Due to the expansion of the Port of Amsterdam, Urban development and the construction of new highways, air pollution levels are about to exceed European guidelines in and around the port region of Amsterdam. To assess the air quality in this region and the impact of theport emissions on its environment, an air quality tool has been developed. It calculates the contribution from the emissions in the port of Amsterdam to the total air pollution for nitrogen dioxide (NO<inf>2</inf>) and particulate matter (PM<inf>10</inf>). The tool is used to calculate annual mean concentrations for actual conditions and future scenario's. It takes into account emissions from traffic, industrial facilities, trans-shipment, navigating ships and ships in the port. For the year 2009, calculations show a relatively small annual mean contribution of the port emissions on the air pollution levels surrounding the port region.