R.C. Harris Water Treatment Plant
The 'Palace of Purification', a 1930s Art Deco masterpiece on Victoria Park Avenue that supplies much of Toronto's drinking water and anchors the Beaches border.
Address: 2701 Queen Street East, Scarborough
The R.C. Harris Water Treatment Plant is among Toronto’s finest Art Deco buildings, nicknamed the “Palace of Purification” for its limestone facades, grand staircases, and cathedral-like filter beds. Though the address reads Queen Street East, the plant sits at Scarborough’s southwestern edge overlooking Lake Ontario.
Engineering and beauty
Opened in 1941 and named for long-serving Works Commissioner Roland Caldwell Harris, the facility still treats a significant share of Toronto’s tap water. Its design proved that infrastructure could be civic architecture.
Try this
- Walk the Harris Water Treatment Plant Park and waterfront path along the intake screens
- Visit during Doors Open Toronto when interior tours are occasionally offered
- Continue west along Queen into the Beaches for a full lakefront day
Good to know
The plant is an active industrial site, exterior grounds are public but access inside is restricted except during special events. Respect fences and security signage.