The water level in the Pilloor Reservoir, another water source for the city, like Siruvani, stood at 97 feet.
Kolarampathy tank has 50 % water and Narasampathy has around 30 % water and the two tanks are seeing good inflows.
The tanks are the first two of the series of tanks in the Noyyal system.
Water flow into tanks in the city and its outskirts increased on Wednesday following good rain in catchment areas of River Noyyal.
The full reservoir level is 100 feet.