The Bangalore Water Supply and Sewerage Board (BWSSB) faces a peculiar problem of turbidity during the monsoon when the Cauvery is in spate. The turbidity (loss of transparency of water due to suspended particles) at the BWSSB reservoirs increases so much that the board isn’t able to treat the water properly. The board is now working on a high-tech treatment plant that can process this high level of turbidity. Bengaluru is set to get an additional 775 MLD (million litres of water per day) of water under the Cauvery fifth stage. Currently, BWSSB is drawing 1,454 MLD of Cauvery water to meet the city’s drinking water needs. The work on the fifth stage is set to begin by end of the year. A BWSSB official said that last year, the water brought in too much of sludge. This affected the plant and water couldn’t be supplied for a day. As per the Bureau of Indian Standards, the turbidity level in water should be in the range of one to five Nephelometric Turbidity Units (NTU). However, last year the turbidity at Shiva Anicut was as high as 100 NTU. The new treatment plant will be able to handle turbid water up to the range of 500 NTU and have a capacity to treat up to 850 MLD of water. BWSSB will also construct ground level reservoirs at Gottigere, Doddakanahalli, Kadugodi, Chokkanahalli, Vasudevapura, Singapura and Lingarajapuram and water will be supplied from Thoraikadanahalli(TK Halli).