The season at a glance

Excellent air quality in the region. Air quality was below national benchmarks on 91 of 92 days (99% of the season). The only exceedance was for PM10 at Wil-gai.

What affected air quality

PM10 and local dust – Fair and Extremely Poor AQCs were recorded only at the Wil-gai industry station. They were due to PM10, likely from local dust sources.

Data availability – Werris Creek industry station did not report PM2.5 data for autumn 2026 due to an instrument fault.

Trends

Another autumn with good air quality

The region experienced one day above national benchmarks in autumn 2026, the same as in autumn 2025. The AQC breakdown is consistent with most recent autumn seasons.

Low rolling annual particle levels continued 

Rolling 12-month PM10 and PM2.5 averages at all stations to the end of autumn 2026 (from 1 June 2025 to 31 May 2026) have remained below relevant benchmarks since the 12-month period to the end of autumn 2020, when air quality was significantly affected by bushfires and dust storms in 2019 and 2020.