A fully-grown pig was dumped in the watercourse between Qormi and Marsa.
A spokesman for the Resources and Infrastructure Ministry said the pig, which was found on December 23, was taken to the abattoir, where it was incinerated, and the area where it was found was disinfected.
The spokesman said anyone seeing a dead animal in the street can call freephone 8007 6608 so that members of the ministry's Cleansing Services Department can collect it and dispose of it.