Air emissions inventories are a critical component of managing air quality and need to be updated regularly to gauge how emissions are tracking in the region. There were many changes in the transport sector over the last decade in the Auckland region, and while these changes have seen positive results, they are being offset by the rate of growth in the region. Future growth will add more pressure and demand on existing infrastructure, resources, goods and services. An update of the air emissions inventory is therefore necessary to assess how the changes in Auckland region have impacted on emissions in the region, and to measure progress towards the Auckland Plan target.

This report estimates annual emissions to air from transport in the Auckland region for the year 2016 from motor vehicles, aviation, rail, road dust (sealed and unsealed), off-road vehicles and road laying for the following ambient air pollutants:
• particulate matter measuring less than 10 micrometres in diameter (PM₁₀)
• particulate matter measuring less than 2.5 micrometres in diameter (PM_2.5)
• oxides of nitrogen (NO_x)
• carbon monoxide (CO)
• carbon dioxide (CO₂)
• sulphur dioxide (SO₂)
• volatile organic compounds (VOCs).

Note
This report corrects errors in the calculation of road dust (PM₁₀ and PM_2.5) from unsealed roads (Section 6.1) and replaces the version published in July 2018, Auckland Council technical report, TR2018/016.

Auckland Council technical report TR2018/016-2