• Wastewater treatment plant of Lavasan city.
• Wastewater treatment plant of Oushan, Fasham and Maigun cities.
• Wastewater treatment plant of Asadabad city.
• Wastewater treatment plant of Chaloos and Nowshahr cities.
• Wastewater treatment plant of Saghez city.
• Wastewater treatment plant of Konarak
• Wastewater treatment plant of Dehdasht
• Wastewater treatment plant of Langerood
• Wastewater treatment plant of Pardis city.
• Wastewater treatment plant of Mamonieh and Zavieh cities.
• Wastewater treatment plant of Sahand
• Wastewater treatment plant of Abadeh
• Wastewater treatment plant of Javanrood
• Wastewater treatment plant of Ivan and sarabeleh cities.
• Wastewater treatment plant of Dogonbadan city.
• Wastewater treatment plant of Oushan, Fasham and Maigun cities.
• Wastewater treatment plant of Asadabad city.
• Wastewater treatment plant of Chaloos and Nowshahr cities.
• Wastewater treatment plant of Saghez city.
• Wastewater treatment plant of Konarak
• Wastewater treatment plant of Dehdasht
• Wastewater treatment plant of Langerood
• Wastewater treatment plant of Pardis city.
• Wastewater treatment plant of Mamonieh and Zavieh cities.
• Wastewater treatment plant of Sahand
• Wastewater treatment plant of Abadeh
• Wastewater treatment plant of Javanrood
• Wastewater treatment plant of Ivan and sarabeleh cities.
• Wastewater treatment plant of Dogonbadan city.