Iran
- Khuzistan Provincial Department of Environment
- Department of Environment of Iran
- Petro Pars Co.
- Petroleum Engineering and Development Company (PEDEC)
- National Iranian Oil Company (NIOC)
- National Iranian South Oil Company (NISOC)
- Ministry of Jihad Agriculture, 6 Provinces
- Provincial Water Authorities; 19 Provinces
- Water and Power Resources Development Company
- Tehran Sewerage Company- Ministry of Energy
- Keshavarzi Bank
- Central Bank of Islamic Republic of Iran
- Fars Housing Foundation of Islamic Revolution
- Forest, Range and Watershed Management Organization of Iran
- Ahwaz Urban Railroad Organization
- Central Organization of Rural Cooperatives of Iran
- Technical Organization of Tehran Municipality
- West Azarbaijan Water and Wastewater Company/li>
- Pardis Petrochemical Company
- Sugarcane Development and By-Products Company
- Oil Seeds Research and Development Company
- Ardebil Province Industrial Complexes Company
- Iran Water Resources Management Company
- Gol-e-gohar Iron Ore Mining Industries
- WASCO (Water Supply from Persian Gulf Company)
- Shiraz Municipality
- Sari Municipality
- Farab Co.
- Arak Machinery Industries
- Haraz Rah Co.
- Iran Industrial Projects Management Company
- Qazvin Roads and Urban development Organization
- Tehran Municipality, Regions2, 4, 6, 13, 17
International
- Afghanistan, Ministry of Water and Energy
- Syria, Ministry of Irrigation
- Tanzania, Ministry of Water
- Cuba, Ministry of Water and Power
- Turkmenistan, Ministry of Energy and Industries
