The Portland Water Bureau carbon footprint consists of emissions from the following sources:

• Electricity use for pump stations, groundwater, lighting, and other facility uses
• Combustion of biodiesel, diesel, and gasoline fuels for transportation, heavy machinery, and power tools
• Natural gas usage for heating
• Employee air travel 

Carbon Footprint Reports

• 2014-2015 Carbon Footprint Report
• 2013 Carbon Footprint Report
• 2012 Carbon Footprint Report
• 2011 Carbon Footprint Report
• 2010 Carbon Footprint Report
• 2009 Carbon Footprint Report
• 2008 Carbon Footprint Report
• 2007 Carbon Footprint Report

For more information, visit the bureau’s Climate Change webpage.