Thunder Bay drinking water path

Source

Lake Superior Surface water

raw water

Intake

Raw water intake pump station

to plant

Treatment

Bare Point WTP chlorination · filtration

finished

Mains

Storage & mains Single-source system delivering through eight pressure zones, seven pump stations, four reservoirs, and one standpipe across the city. Bare Point has been the sole municipal residential supply since major 2007 upgrades.

drinking water

Tap

Household tap Thunder Bay

Source & supply
Lake Superior
Single-source system delivering through eight pressure zones, seven pump stations, four reservoirs, and one standpipe across the city. Bare Point has been the sole municipal residential supply since major 2007 upgrades.
Thunder Bay drinks Lake Superior—one of the world’s largest freshwater lakes—through a membrane plant that replaced earlier treatment works dating to 1903.
Treatment
Bare Point Water Treatment Plant
City-owned plant on Lakeshore Drive / Bare Point. ZeeWeed membrane ultrafiltration and sodium hypochlorite disinfection. Operational capacity 113.5 million litres per day. Main intake roughly 730 m offshore at about 10 m depth; gravity feed into the plant.
Treatment on record: chlorination · filtration
At the tap
Hardness 277 mg/L (Very hard)
Grade C (Fair)
pH 7.5 · lead 0.5 μg/L
ECCC / municipal open data (seed)