BENGALURU: Deputy chief minister G Parameshwara, who also holds the Bengaluru development portfolio, on Friday sent builders into panic mode by announcing they will soon have to give an undertaking revealing from where they plan to source potable water for apartment complexes they develop on the city’s outskirts. “Apartment complexes are coming up everywhere and Bengaluru’s growth is unstoppable. The source of drinking water for apartment dwellers on the outskirts is the biggest concern. We want to resolve the issue by getting builders to reveal from where they plan to provide potable water. They (builders) can’t wash their hands of the responsibility by providing only borewell water,” Parameshwara said at an event in Malleswaram.According to sources, the statement came after a few apartment dwellers made oral complaints about not getting adequate Cauvery water. The increasing level of total dissolved solids (TDS) in borewell water, which ups the risk of skin diseases, is among the primary complaints from people living on the outskirts. The Confederation of Real Estate Developers Association of India, however, is not amused. Suresh Hari, chairman, Credai-Karnataka chapter, said it’s the government which needs to provide potable water to every citizen and not builders. “All adequate measures are taken till the project is under builders. Once it’s handed over to the buyer association, we don’t know they tackle the water crisis and from where tankers are called. We do provide Cauvery water connections to apartment complexes and each unit by paying pro rata charges to the BWSSB, and it’s their responsibility to provide water,” he explained. Credai-Karnataka chapter president Kishore Jain echoed his views. “If Cauvery water is not enough, it’s the government’s responsibility to find other sources,” he added. Parameshwara is expected to meet water board and urban development department officials to discuss amendments to the Bangalore Water Supply and Sewerage Board (BWSSB) Act. Tushar Girinath, BWSSB chairman, said: “This is a multi-departmental issue. The urban development department, housing department, BWSSB and law department need to take a call.” STPs mandatory for highrises Parameshwara said BWSSB will make it mandatory for builders to construct sewage treatment plants in highrise apartments so that treated water can be utilised for gardening and other purposes. According to norms, new complexes with 20 or more units need to have their own STPs.