• Power stations.
  • Municipal Water and Sewerage Companies.
  • Drinkable water treatment refineries.
  • Landfill units (leachate treatment)
  • Wastewater treatment plants (M.E.Y.A.) of food processing industries (dairy, canning, meat processing industries, slaughterhouses, breweries, fish farming, poultry industries, olive processing industries, bottlers, etc.).
  • Leather- tannage processing industries.
  • Textile processing, dyeing and spinning industries.
  • Paper processing industries - paper mills.
  • Agricultural fertilizer trading companies.
  • Feed Industries 
  • Olive mills
  • Cement industries
  • Galvanizing industries
  • Swimming pools and  private pools