| Company Name | Fax | Contact | Lesson | Website address | |
| Ministry of Power | info@moe.gov.ir | 021816000000 | 021816000000 | Iran, Tehran, Vali-e-Asr St., at the beginning of Niayesh Highway, No. 4, Ministry of Energy building, postal code 19966833913 | info@moe.gov.ir |
| Country Water and Sewerage Engineering Company | info@nww.ir | 02189600000 |
02189600000 | Iran, Tehran, Shahid Baradaran Abdullah Zadeh Alley (former village) Building No. 6 Amirkabir | info@nww.i |