[1] It originates in the eastern slopes of the Saiwar Protected Forest (PF) hills in Sikar District, enters Jaipur district near the foot of these hills, and after initially flowing southeast and east turns northeastwards near Shahpura and continues further till it exits Rajasthan to enter Haryana and further drains into Yamuna in Delhi, where its channeled course is also called the Najafgarh drain, which also serves as Najafgarh drain bird sanctuary.

The current and paleochannels of Sahibi river have several important wetlands that lie in series, including the Masani barrage wetland, Matanhail forest, Chhuchhakwas-Godhari, Khaparwas Wildlife Sanctuary, Bhindawas Wildlife Sanctuary, Outfall Drain Number 6 (canalised portion in Haryana of Sahibii river), Outfall Drain Number 8 (canalised portion in Haryana of Dohan river which is a tributary of Sahibi river), Sarbashirpur, Sultanpur National Park, Basai Wetland, Najafgarh lake and Najafgarh drain bird sanctuary, and The Lost lake of Gurugram, all of which are home to endangered and migratory birds, yet largely remain unprotected under extreme threat from the colonisers and builders.

The Sahibi River originates from the eastern slopes of the Saiwar Protected Forest hills in Aravalli Range near Jitgarh and Manoharpur in Sikar district of Rajasthan state.

After gathering volume from a hundred tributaries, the Sahibi River forms a broad stream around Alwar and Kotputli.

The Basin extends over parts of Jaipur Rural and Neem Ka Thana, Kot Behror, Khairthal, Rewari, Jhajjar, Gurugram districts.

The catchment area of the Sahibi River in Rajasthan is 4,523.67 square kilometres (1,746.60 sq mi) of Jaipur, Alwar and Sikar Districts, between latitudes 27°16' and 28°11' and longitudes 75°42' and 76°57'.

It leaves Rajasthan state beyond Kotkasim in Alwar district near village Lalpur and covers a total distance of about 222 km up to Dhasa Bund.

The Najafgarh Drain is the capital's most polluted body of water due to the direct inflow of untreated sewage from surrounding populated areas.

[8][9][10][11][12] Regulators at the Keshopur Bus Depot on the Outer Ring Road are wide with thick and high embankments.

A vast amount of water is retained in this widened drain by closing the Kakrola regulators under Najafgarh Road to recharge the local groundwater table.

[17][18] A red stone statue of Vamana Dev, now displayed at the Shri Krishna Museum, Kurukshetra was unearthed in 2002 on the Sahibi riverbed near Bawal.

[17][18] In various other places on Sahibi riverbed, many artifacts have been found, including arrowheads, fishhooks, spearheads, awls, and chisels.

This is an important part of ecological corridor along the route of Sahibi river which traverses from Aravalli hills in Rajasthan to Yamuna via Masani barrage, Matanhail forest, Chhuchhakwas-Godhari, Khaparwas Wildlife Sanctuary, Bhindawas Wildlife Sanctuary, Outfall Drain Number 8 and 6, Sarbashirpur, Sultanpur National Park, Basai and The Lost Lake (Gurugram).