Is reverse osmosis worth it for drinking water?

Reverse osmosis (RO) is genuinely one of the most effective home water filtration methods available, and for many Ottawa homeowners it's absolutely worth the investment — but it depends on your water quality concerns and how much you value convenience.

What RO Actually Does

Reverse osmosis forces water through a semi-permeable membrane that removes up to 99% of contaminants including lead, chlorine, fluoride, nitrates, arsenic, and dissolved solids. Ottawa's municipal water is generally safe and meets Health Canada standards, but many residents still notice taste and odor from chlorination, or have older homes with lead solder in pipes. RO addresses both of those concerns very effectively.

The Practical Reality

A typical under-sink RO system produces excellent drinking water on demand and costs between $300 - $800 for the unit, with professional installation adding $200 - $400 in the Ottawa market. Ongoing costs are modest — filter replacements run roughly $50 - $150 per year depending on your system. The main trade-offs are that RO wastes some water in the filtration process (typically 3-4 gallons per gallon filtered), and it removes beneficial minerals along with contaminants. Some systems add a remineralization stage to address this.

Ottawa-Specific Considerations

If your home was built before 1990, there's a reasonable chance you have lead solder at pipe joints, which makes a point-of-use filter like RO particularly valuable for drinking and cooking water. Ottawa's water also comes from the Ottawa River and is heavily treated, so chlorine taste is a common complaint that RO eliminates completely.

When It Makes the Most Sense

RO is worth it if you're currently spending money on bottled water, have young children or immunocompromised family members, or have confirmed water quality concerns from a home water test. If you're just mildly bothered by taste, a simple carbon filter pitcher or faucet filter at $30 - $100 might be sufficient.

For installation, a licensed plumber will tap into your cold water supply line and drain — it's a relatively straightforward job but does require proper connections to avoid leaks. If you'd like to discuss adding an RO system to your home, Ottawa Pro Plumbing offers free consultations to help you choose the right setup for your situation.