From source to sink
Where Mississauga water comes from
A plain-language tour of the lakes, rivers, or wells that feed Mississauga, the plants that clean the water, and how it reaches kitchen taps. Lab grades for hardness, lead, and pH live on the water quality page.
On the map
Where Mississauga water lives
Source waters and treatment plants pinned from published utility names. Open a pin below for the full OpenStreetMap view.
- CityMississauga
Municipal service area
- Source waterLake Ontario
Source water
- Treatment plantArthur P. Kennedy Water Treatment Plant
Approximate pin near Mississauga (exact plant coordinates pending)
- Treatment plantLorne Park Water Treatment Plant
Approximate pin near Mississauga (exact plant coordinates pending)
Map data © OpenStreetMap contributors. Pins are approximate for orientation, not legal survey points.
Deep dive for households
Mississauga drinking water starts as surface water (rivers, lakes, or reservoirs). The named source on the utility record is Lake Ontario. That is the water that eventually reaches kitchen taps after treatment, not a separate bottled brand.
Mississauga uses more than one treatment plant (Arthur P. Kennedy Water Treatment Plant; Lorne Park Water Treatment Plant). Utilities often run plants in parallel so different neighbourhoods can be served, or so one plant can cover for another during maintenance. Arthur P. Kennedy Water Treatment Plant: Peel Region plant on Lake Ontario serving primarily the east side of Mississauga and Brampton (plus southern Caledon and York Region). Up to 1,200 million litres per day; conventional plus advanced ozone / biologically active carbon / membrane trains. Operated by OCWA. Lorne Park Water Treatment Plant: Peel Region plant largely underground beneath parkland on the Lake Ontario shore; serves primarily the west side of Mississauga and Brampton. Up to 500 million litres per day; conventional plus membrane / UV / GAC advanced train. Operated by OCWA.
After treatment, water moves through pumps, storage, and underground mains to reach streets and buildings. South Peel Drinking Water System distribution is owned and operated by Peel Region; Mississauga sits entirely on the lake-based South Peel network (Caledon wells are separate rural systems).
One detail that makes Mississauga water feel local: Together the two South Peel plants produced over 211 billion litres in 2025 and also export water to York and Halton. Lab grades for hardness, lead, and pH sit on the city water quality page; this overview is about the route the water travels.
Where it starts
Surface water
Rivers, lakes, or reservoirs, not underground wells as the main draw.
Research confidence: high
Named source waters
- Lake Ontario
Treatment plants
These are the buildings that filter and disinfect water before it enters city pipes.
Arthur P. Kennedy Water Treatment Plant
Peel Region plant on Lake Ontario serving primarily the east side of Mississauga and Brampton (plus southern Caledon and York Region). Up to 1,200 million litres per day; conventional plus advanced ozone / biologically active carbon / membrane trains. Operated by OCWA.
Lorne Park Water Treatment Plant
Peel Region plant largely underground beneath parkland on the Lake Ontario shore; serves primarily the west side of Mississauga and Brampton. Up to 500 million litres per day; conventional plus membrane / UV / GAC advanced train. Operated by OCWA.
How it reaches your street
South Peel Drinking Water System distribution is owned and operated by Peel Region; Mississauga sits entirely on the lake-based South Peel network (Caledon wells are separate rural systems).