At a home in Chennai, the family noticed something strange every time they turned on the tap. “The water smelled… really bad. A strong, rotten-egg odour hit us immediately,” one of them said. “The kitchen, the bathroom, even washing hands became unpleasant.” They cleaned the taps. They flushed the overhead tank. They added disinfectants. Nothing worked. It wasn’t the taps. It wasn’t the plumbing. It wasn’t the detergent. It was the water itself. Tests revealed the real culprit: hydrogen sulfide gas and bacterial contamination. Borewell water, stagnant overhead tank water, and accumulated sludge were releasing that pungent rotten-egg smell. Over time, the odor had infiltrated every faucet and fixture in the house. Why Did This Happen? Several factors made the smell worse: Hydrogen sulfide in water → creates the classic rotten-egg smell in borewell or stagnant water. Bacterial contamination → microorganisms in the tank release foul, musty odours. Sludge and sediment → decomposed organi...