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We will be completing maintenance on the biofilter beds at the Castlemaine Water Reclamation Plant between Tuesday 13 January and Friday 16 January.

During this work those around the plant may notice a temporary increase in odour. 

Biofilter beds contain a thick layer of mulch containing odour-eating bacteria that clean the odorous (smelly) air created during the sewage treatment process. This media is being replaced as part of routine maintenance. 

Once complete, the work will improve ongoing management of odours generated from the sewage treatment process.

We continue to monitor odour at the Castlemaine Water Reclamation Plant. If you wish to report odour, please contact our Customer Support Operations Officer Ned Wurf on 1300 363 200.
 

Last updated on 09 Jan 2026
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