Sewage is the wastewater released by homes, office, industries, hospitals and other users. It also includes rainwater that has run down the streets. The water that washes off the rooftops and roads also contains impurities. Sewage is actually a liquid waste that has many suspended impurities in it, which are known as contaminants.
Sewerage is the network of big and small pipes that carry sewage from the point it is produced to the point of disposal, i.e. the treatment plant.
