Three e-toilets, also known as bio toilets, installed in September on the waterfront leading from the Gateway of India towards Radio Club in Colaba, have invited the ire of the Clean Heritage Colaba Residents' Association (CHCRA). Several locals say that the toilets on the waterfront are an eyesore and an alternative space could have been found for them. This way, they are defacing the heritage precinct walk.

Bio toilets disintegrate and decompose human waste into water and biogas. The decomposition is carried out by bacteria in the bio-digestion tank. They are environment friendly and reduce water consumption. Pervez Cooper, vice-president CHCRA said, "They look atrocious, three boxes simply jutting out from the promenade. We are totally in sync with those who think that Mumbai needs more public toilets, but there are other spaces where they can be placed. In the monsoon, when there is high tide, the water rises above the promenade wall and comes onto the road. These toilets will be unusable then."