Auckland air quality report July 2021
Author:Louis Boamponsem, Auckland Council Research and Evaluation Unit, RIMU
Source:Auckland Council Research and Evaluation Unit, RIMU
- No breach of national air quality standards has occurred this year (January to June).
- Overall, air quality has slightly improved in Auckland.
- There is a downward trend in nitrogen dioxide (NO2) concentration in the Auckland CBD.
- Sulphur dioxide (SO2) concentrations in the monitoring sites are reducing.
- PM10 source apportionment modelling study revealed that 92% of the concentrations come from five common source contributors in Auckland urban sites. These sources are: biomass burning (mainly from home heating), motor vehicles, secondary sulphate, marine aerosol, and soils (windblown soil, road dust, and dust generated by earthworks, construction, and roadworks).
- Biomass burning source contributions to urban PM10 levels in Auckland were found to be increasing.
- The long-term trend analysis of motor vehicles, secondary sulphate, and soils contributions to PM10 shows that concentrations are decreasing over the monitoring period.
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Auckland Council, July 2021