The St. Thomas Water Distribution System directly supplies water to the residents of St. Thomas as well as portions of the interconnected Municipality of Central Elgin and the Township of Southwold.  The water is purchased from the Elgin Area Primary Water Supply Board and the St. Thomas Area Secondary Water Supply Board.  The system complies with the Ontario Safe Drinking Water Act, Regulation 170/03 and with the terms and conditions of the applicable Drinking Water licence and Drinking Water Works Permit.

For view reports, policies and regulations regarding drinking water, see the links to the left of this page.