自来水气味异常，余杭区人民政府道歉

Core Viewpoint - The water quality issue in Yuhang District, Hangzhou, was caused by specific natural climatic conditions leading to the production of sulfur compounds from anaerobic degradation of algae, and the situation is under investigation [1]. Group 1: Incident Overview - On July 16, the Renhe Water Plant detected abnormal odor indicators in the water quality, prompting an emergency response to switch water sources and control the water quality effectively [1]. - A rumor circulated on July 18 claiming that the water contamination was a man-made incident affecting nearly 3 million residents, which was later debunked by local authorities [1][2]. Group 2: Official Responses - The local police and water authority confirmed that the main pipeline network has returned to normal, and the odor was due to high odor indicators while other quality metrics remained normal [2]. - Authorities urged the public not to believe or spread rumors regarding the water quality issues, emphasizing the importance of accurate information dissemination [1][2].