Water supply to Delhi, Noida and Ghaziabad will be affected from October 15, due to maintenance work being carried out in the Ganga canal.

“The canal will be closed from October 15 for 20 days for maintenance work affecting about 30 to 40 per cent of water supply,” executive engineer of UP irrigation department, Sudarshan Lal, said.

The department has informed Delhi Jal Board about it, he said.

Water supply to 19 districts of Uttar Pradesh including Muzaffarnagar, Meerut, Bulandshahr, Aligarh, Etah, Hathras and Firozabad will also be affected, he added.