BWSSB discontinues supply from TG Halli

Lack of rainfall, low water levels force stoppage of supply after six years

 After nearly six years, the Bangalore Water Supply and Sewerage Board (BWSSB) has discontinued supplying water from the Tippagondanahalli Reservoir (TGR) to the City from November 15. The decision came after the water level dropped to 2,500 feet as against the threshold of 2,506 feet recently.

The total capacity of the reservoir is 2,574 feet. Consumers, especially residents of Rajajinagar and surrounding areas, have been provided with alternative supply through the newly commissioned Cauvery IV stage II phase.

According to BWSSB officials, water supply from the TGR was commissioned in 1933 and drawal was discontinued for the first time in 1985 because of a failed monsoon. The supply resumed after a short interval. Again in 2002, when Cauvery IV stage I phase was commissioned, water supply from the TGR was discontinued for nearly a year.

Recently, the water supply was reduced to 28 million litres of water per day (mld) as against the average of 130 mld. As per records, the last drawal from TG Halli was just around 12 mld.

The supply from the TGR may resume during monsoon next year, the official added.Drawing of water from TG Halli reservoir is cost effective as it needs only two stages of pumping, at the TGR station and Tavarekere. However, three stages of pumping are required for the Cauvery project- at Thorekadanahalli (TK Halli), Harohalli and Tataguni.

The water level is depleting at the TGR mainly due to change of land use, inconsistent rainfall, intensive groundwater irrigation and blocking of secondary and tertiary valleys. The reservoir has not been desilted for many years, which has also added to the problem.

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