In general, municipal wastewater is made up of domestic wastewater, industrial wastewater, storm
water, and by groundwater seepage entering the municipal sewage network. Domestic wastewater
consists of effluent discharges from households, institutions, and commercial buildings. Industrial
wastewater is the effluent discharged by manufacturing units and food processing plants. In
Faisalabad, a large proportion of municipal wastewater from some sections of the city consists of
industrial wastewater discharges. Unlike in some developed cities where the systems are separate,
here, the municipal sewage network also serves as the storm water sewer. Due to defects in the
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sewerage system, there is groundwater seepage as well, adding to the volume of sewage to be
disposed.