For the drainage and sewerage of the city a subterranean river whose source and mouth are unknown is utilized.
A waterborne sewerage system began to be introduced in 1906.
The sewerage system and conditions of house sanitation were found extremely inadequate when the American army occupied the city in 1899.
district for certain special purposes such as water-supply, sewerage or the like.
There is a modern system of drainage for the towns, and all sewerage has been intercepted from the Grand Harbour.