Adiyan - Waterworks Phase II

Water Treatment

Start of works

July 2013

Progress status


Data updated to april 2021

Lagos, Nigeria
SDG Obiettivi di sviluppo sostenibile
Clean water and sanitation Clean water and sanitation

The project, located in Adiyan near Lagos, involves the construction of an intake station situated on the right bank of the Ogun River, complete with a vertical pumping system which conveys the untreated water in a spheroidal cast iron pipe 1,600 mm in diameter and approximately 8 km long.

The pipe carries the water to the purification plant comprising two parallel treatment lines and the sludge line. The purification treatment includes the flocculation, flotation, aeration, filtration with sand and activated carbon and disinfection with UV rays. The plant twill have a purification Capacity of 320,000 m3/d.

When the water has been purified and rendered fit for drinking it is sent by a pumping station in two 80 m diameter circular tanks, 12 m tall, and introduced into the aqueduct.

The Adiyan water treatment plant, an entirely gravity plant with reduced power consumption, is the only one of its kind in Africa.

Technical data

Excavations (m3)


Concrete (m3)


Sand for Filters (tons)