Despite the ongoing cleaning efforts, Sakaja said large-scale investments are required to overhaul Nairobi's drainage system.

The already filled-up Dandora dumpsite holds about 1.8 million tonnes of solid waste against a 500,000-tonne capacity

The CS cited the Athi Water and Sewerage Company and the Nairobi Water and Sewerage Company as some of the largest polluters.

The directive, issued by NEMA on April 8, requires all organic waste from households and institutions to be placed in 100 per cent biodegradable bags.

Governor Sakaja has blamed the private sector for the perennial garbage menace in the capital.

Eastleigh residents have been protesting against the poor state of roads, poor sanitation, and uncollected garbage in the business hub.