Decisions · 5 min
Whole-home vs point-of-use water treatment
Point-of-entry protects every tap. Point-of-use RO polishes drinking water. Most Canadian homes combine both.
- Author
- WaterFilterHelp Editorial Team
- Canadian home-water research and consumer education
- Reviewed by
- WaterFilterHelp Standards Review
- Fact-checked against official Canadian guidance and certification sources
- Last reviewed
- 2026-08-23
Looking for a lab or free test option? Find a Water Test · Already have results? Explain your water test · Not sure which system you need? Run the Water Problem Wizard.
Whole-home (point of entry)
Softener, iron filter, carbon and UV typically sit where water enters the house. Every shower, laundry load and faucet benefits.
Point-of-use
Under-sink RO or specialty drinking filters treat a single faucet. Best for contaminants you mainly care about when swallowing water.
The usual combo
Whole-home for comfort and plumbing protection; RO for the kitchen. That pattern dominates Canadian installs.
Decide with symptoms
Run the wizard — it will suggest which stages belong at the entry versus the sink — then get matched to a local pro.