A stretch of Albany Highway near Kojonup remains closed after a water main burst near a decommissioned fuel tank on Sunday morning, spilling potentially contaminated liquid.
The leak was isolated just after 10.30am on Sunday, about half an hour after it was first reported in the Shire of Kojonup.
Main Roads WA closed a stretch of Albany Highway that runs through the Great Southern town, with a detour in place between Blackwood Road and Pensioner Road on Sunday, which remained closed on Monday afternoon.
Two DFES crews attended the site on Sunday with utilities services also on scene trying to fix the burst.

At about 11.30am, crews reported the smell and visuals of fuel had significantly reduced.
According to a DFES spokesperson, the water main burst near a reportedly decommissioned underground fuel tank near a petrol station.
While the tank was shown to be empty, concerns remained about the possibility of residue mixing with the water.
The Pollution Response Unit completed testing on the spill by Monday afternoon, however the road remains closed until local government authorities can be sure it is safe to reopen it.
The closure on the main route between Perth and Albany comes over the WA Day long weekend, when thousands of travellers will use the highway to travel between the two locations.
https://thewest.com.au/news/albany-advertiser/section-of-albany-highway-remains-closed-near-kojonup-after-water-mains-burst-near-decommissioned-fuel-tank-c-18894923