Understanding Mississauga's water
Source: Region of Peel, South Peel water quality report 2025.
Where does Mississauga's water come from?
Mississauga's water comes from Lake Ontario and is treated at the Region of Peel's lakeside water treatment plants. It's microbiologically safe, but many homes see:
- Hard water, 120–130 mg/L
- Chlorine odour or taste
- Possible lead in homes built before the mid-1950s
- Sediment or discolouration after watermain work
Homes built before the mid-1950s may still have lead service pipes, which can affect drinking water even though the supply itself is treated.
Recommended water treatment for Mississauga homes
We recommend systems based on where your water comes from. Your free in-home test confirms the fit before anything is installed.
Mississauga homes on Peel Region water
Port Credit, Streetsville, Meadowvale, Erin Mills, Clarkson, Cooksville, Malton, Churchill Meadows
A softener is worth it in almost every detached and semi-detached home. Add reverse osmosis at the kitchen sink if your home is older or you want bottled-quality drinking water.
Signs you may need a water filter
- White film on dishes or glassware
- Dryness after showering
- Appliances needing frequent descaling
- A chlorine smell or metallic taste
- You live in an older home (pre-1970s)
Nearby cities we also serve
Questions
How hard is Mississauga water?
Region of Peel reports 120 to 130 mg/L for the South Peel system (2025), about 7 to 7.6 grains per gallon. That's hard water.
Do I need a lead filter in Mississauga?
Only if your home has lead pipes or a lead service line, which is most likely in homes built before the mid-1950s. A certified reverse osmosis system reduces lead at the kitchen tap.
Free in-home water test
Find out what's in your Mississauga water
We test your water at your home, show you what's in it, and recommend the system that fits.
- Free
- About 30 minutes
- No obligation