1) Sewage: mixture of water and liquid waste generated due to different activities of the community is termed as "sewage"

2) Domestic sewage: Liquid waste generated due to domestic activities is termed as "domestic sewage".

3) Industrial waste: liquid waste generated due to industrial activities is termed as "industrial waste".

4) Sewer: pipes required to carry the sewage from one place to another are termed as "sewers".

5) Sanitary sewage: mixture of domestic and industrial sewage is termed as "sanitary sewage".

6) Sullage: kitchen and bathroom waste taken together is termed as "sullage".

7) Runoff/drainage: liquid waste generated after heavy rain or storm is termed as "runoff/drainage".