Attachment 6 - Odour Impact Assessment - Katestone · 132005.638.06

5.3      Existing sources of emissions

National Pollutant Inventory (NPI) reporting data for industries with significant emissions to air for the period
2024/2025 was reviewed to identify other potentially odorous major industries near to the Noosa Resource
Recovery Centre. The nearest industry likely to produce odours is the Noosa Coastal Sewage Treatment Plant
approximately 6.2 km to the northeast. The Sewage Treatment Plant is likely to exhibit a different odour profile to
sources at the Noosa Resource Recovery Centre and is sufficiently distant that cumulative impacts are considered
highly unlikely.

Therefore, there are no nearby sources that are likely to have significant emissions of odour that are similar to the
composting and landfill odour characters.


5.4      Meteorology

Local meteorology is of paramount importance for dispersion of odour emissions generated by the facility’s
activities; key features are wind speed, wind direction, atmospheric stability and boundary layer mixing height.
Conditions in the local area, as derived from the meteorological modelling carried out for the assessment, are
discussed in detail in Section A1.5 of Appendix A, but can be summarised in simple terms based upon the wind
rose presented in Figure 6, which summarises the wind speed and direction in 2020.

Predicted annual average wind speed at the site in 2020 was 1.87 m/s, with winds most commonly coming from
the southeast through to south-southwest. Average dispersion of pollutants can be expected to follow this general
pattern; however, peak odour impacts may occur under specific meteorological conditions and odour impact
contours should not necessarily be expected to align with the prevailing wind conditions.




Figure 6      Annual wind rose for the site for 2020 (extracted from TAPM/CALMET)




 Katestone Environmental Australia Pty Ltd                                                      17 September 2026
 D25072-8 Noosa Council - Noosa Composting Odour Assessment - Final                                      Page 15