Pollutants loads in wastewater discharged to wastewater treatment plant devices in time unit equalling a product of intensity of wastewater flow and concentration of pollutants in it. Pollutants load can be expressed in e.g. BZT₅, ChZT, suspension or other pollutants characteristic for a given type of wastewater.

• Wastewater discharged to wastewater treatment plant
• Treated wastewater