A toxin that has been leaking into groundwater in South Lake Tahoe near the “Y” where highways 50 and 89 split, since the 80’s, has closed several wells, and prompted a half million dollar study to find the source of the problem. Shelly Thomsen with the South Tahoe Public Utility District says, there’s no need to buy bottled water because the tap is perfectly safe. A possible source of the contaminant could be the former Lake Tahoe Laundry Works, a dry cleaner that used to do business at the “Y,” but closed several years ago.