Coimbatore district recorded an average rainfall of 23.13 mm in the 24 hours ending at 7.30 a.m. on Wednesday (October 21), with the 23 rain gauge stations recording a cumulative 532.10 mm, classified as moderate rainfall, according to the District Disaster Management rainfall report.
Recent rain has led to a gradual rise in water levels at Pilloor and Siruvani reservoirs, the key drinking water sources for Coimbatore, officials said.
The chain of dams and hydropower facilities upstream of Pilloor includes Upper Bhavani, Avalanche, Emerald and Kundah dams, along with Kethai and Parli powerhouses, through which water is channelled towards Pilloor. Rainfall across these catchments influences inflows into the reservoir.
As on Wednesday, Pilloor reservoir stored 1,355.75 million cubic feet (mcft) against its full capacity of 1,568 mcft. The water level stood at 90.75 ft against the full reservoir level of 100 ft. The inflow was 826 cusecs, while the outflow was 1,104 cusecs for power generation. There was no spill discharge.
Pilloor recorded 20 mm of rainfall, followed by Barali (8 mm), Geddai (4 mm), Kundah (3 mm), Emerald (2 mm) and Avilanchi (1 mm). Upper Bhavani and Porthimund recorded no rainfall.
At Siruvani dam, the depth of water stood at 33.78 ft against the full depth of 49.53 ft, with useful storage of 355.16 mcft. The dam received 4 mm of rainfall, while Adivaram recorded 12 mm.
The Siruvani scheme supplied 56.34 million litres of water a day (MLD) to the Coimbatore Corporation, against a planned quantity of 98.12 MLD.
Published - October 21, 2026 06:05 pm IST