Watewater can be both sanitary, industrial and surface water. Wastewater is deterioted of quality from human creations. Wastewater often consist of floating waste from industrial processes or agriculture. 

Industrial wastewater is contaminated water which has been used to industrial purposes. Examples of industrial activity: 

  • Buildings
  • Installations
  • Industry
  • Transportation
  • Road

Industrial wasteawater often contain of particulated or dissolved substance (process water) or be heated (cooling water).

Surface water can be water which drains off from farms, streets and roofs.