Emergency services were called to Cromer after a large quantity of white powder was found dumped beside a creek, triggering a precautionary hazmat response due to concerns about potential environmental impact.
Discovery At Dee Why Creek In Cromer
Firefighters from Fire and Rescue NSW Dee Why Station responded just before 1:00 p.m. on Saturday, 31 January, to a report of a white powdery substance on the bank of Dee Why Creek near Fisher Road North, Cromer.
The creek connects to Dee Why Lagoon, and a local resident at the scene raised concerns the material could be washed into the waterway during rainfall.

Photo Credit: Pexels
Initial Assessment And Hazmat Escalation
Firefighters assessed the scene and estimated the quantity of the substance could be up to 20 kilograms. As the material was unidentified and located beside a waterway, crews treated the situation as a potential hazard.
A restricted access zone was established, and specialist hazmat assistance was requested to safely identify and manage the substance.
Specialist Testing And Removal
A specialist heavy hazmat unit from Alexandria arrived at the site just before 1:45 p.m. Firefighters wearing protective suits and breathing apparatus collected samples of the substance and water from the creek nearby.
On-site scientific testing identified the material as starch-based, most likely flour or a similar substance. As a precaution, firefighters bagged and removed the material from the creek bank while remaining in protective equipment.
Earlier Report And Council Response
During the incident, a resident advised that the substance had been reported earlier in the week. An email response provided at the scene indicated sampling had suggested the material was likely flour and that clean-up was planned for the coming week.
NBC later confirmed it was aware of the dumped material and said reports of dumping are prioritised based on the likelihood of harm. Once assessment indicated no immediate risk, removal was scheduled.
No signage was present at the site to advise passers-by that the material had been assessed or that removal was planned.

Photo Credit: Pexels
How Such Incidents Are Managed
When unknown substances are found near waterways, emergency crews assess the immediate risk and may escalate the response if the material cannot be identified on arrival. Specialist hazmat units are deployed when there is uncertainty about toxicity or environmental impact, particularly where runoff could affect connected waterways.
Testing and removal decisions are based on the results of on-site analysis, with precautionary controls remaining in place until the material is identified and safely removed.
Published 2-Feb-2026




























