Preliminary investigations into the recent spill from a milk tanker into a creek in the state's north-west indicate no signs of environmental harm.
The accident occurred earlier this month near Riana, south of Penguin, when a tanker rolled off a private road on the edge of Adam's Creek. The creek flows into the Blythe River.
Environmental officers were called to the scene and discovered the tanker on its side. They worked with the tanker crew to minimise environmental harm. It’s estimated about 20,000 litres of milk was spilt.
Director EPA Warren Jones said Environment officers took water samples at the creek on the day of the accident and a further set of samples was taken four days later.
"Our preliminary investigations indicate that no environmental harm was caused as a result of the milk going into the creek," Mr Jones said.
"This is likely to be the result of high river flows due to the heavy rainfall in the area at the time, the steep gradient of the creek, which caused the milk to rapidly flow through the system and the lack of in-stream storages, meaning that milk was not trapped."
Mr Jones said he has been supplied with a full report of the incident.
"The company involved will undertake a risk assessment of all private roads used by its tankers to determine if they are adequately engineered for heavy loads," Mr Jones said.