Blog · Waterloo
Lead pipes in older Waterloo homes: free testing and what to do with the result
Lead water service pipes are mostly a problem of Waterloo's oldest streets. If your house is in Mary-Allen, uptown, Westmount or another pre-war neighbourhood, the City will test your tap water for free, and the result tells you whether replacing the service line should be on your list.
Last updated September 25, 2026 · Reviewed by the Waterloo Plumbing Co. team
Which Waterloo homes might have lead
Lead piping was used for water services before the 1950s. The City of Waterloo notes that lead is typically absent from homes built after the mid-1970s, and that lead in plumbing was banned in 1986. Health Canada similarly notes that lead service lines and fittings were commonly used until about 1975.
Lead can also come from older solder on copper pipe and from some brass fittings, which is why testing covers homes built before 1989. The City lists Mary-Allen, Uptown, Westmount, Lincoln Heights, Sugarbush and Northdale as focus areas for its testing program.
How to check your own service line
Find where the water line comes through the basement wall, usually near the meter and main shut-off. Look at the pipe between the wall and the meter:
- Lead is dull grey, soft, and does not ring when tapped. If you scratch it gently with a key, the scratch is shiny silver. It often has a bulb-shaped joint where it meets other pipe. A magnet will not stick.
- Copper is orange-brown, and a scratch shows bright copper.
- Galvanized steel is grey and hard, and a magnet sticks.
- Plastic (often blue, black or white) is a newer replacement.
What you see in the basement only tells you about the pipe entering the house. The buried portion under the lawn may be different, which is why a water test matters.
The City of Waterloo's free lead test
The City offers in-home lead testing for private homes built before 1989 and some non-residential properties. To take part:
- Complete the City's pre-screening form, or call 519-886-2310 ext. 30287, to confirm your home qualifies.
- A technician visits on a weekday. The visit takes about an hour.
- The sample is collected from a cold, hard-water tap, one that does not go through a softener or filter.
- You are told the results. If they are high, the City retests to confirm before recommending next steps.
Participants get a small credit on their next water bill. Questions go to leadsampling@waterloo.ca.
What the numbers mean
In 2019 Health Canada lowered the maximum acceptable concentration of lead in drinking water to 0.005 mg/L, half the previous guideline of 0.01 mg/L set in 1992. If your result is near or above that number, treat it as a reason to act rather than wait.
Why a test can come back high even without a lead service
A result above the guideline does not always mean the service line is lead. Older lead-based solder on copper joints and some brass valves and faucets can also release lead, especially when water sits still overnight. That is why the technician's advice after a retest matters. If the service entering the house is copper or plastic and the result is still high, the fix may be replacing a few metres of old soldered piping or an old faucet, not digging up the front lawn. If the service is lead, replacing it is the first step, and interior plumbing is checked after.
What to do while you decide
- Run the cold tap before drinking if water has sat in the pipes for several hours, such as first thing in the morning. Use the running water for plants or cleaning.
- Use cold water for drinking and cooking, including baby formula, and heat it on the stove rather than drawing it from the hot tap.
- Use a certified filter. Health Canada advises choosing filters tested by an accredited third-party certification body for lead reduction against NSF/ANSI Standards 42 and 53, with a lead-reduction claim on the package. Replace cartridges as the manufacturer directs.
- Clean aerators on your faucets, where particles can collect.
Replacing a lead service line
The only permanent fix is replacing the lead pipe. On the private side, that means a new copper or plastic line from the property line into the house, usually by trenchless pulling or a narrow dig, plus a new main shut-off and connections at the meter. The City of Waterloo owns most water meters, and homeowners are responsible for the pipes and valves on their property. Before booking, ask the City about the public-side section so both halves can be coordinated. Replacing only one side can leave lead in the line.
Across the line in Woolwich, the Township's approach is similar: it pays to replace lead on public property, the owner pays for the private side, and replacing private lead piping in Elmira or St. Jacobs requires a building permit. Woolwich also notes that lead was common in interior plumbing of buildings built before 1990, not just in the service line.
In uptown and Mary-Allen houses, a service replacement is also a good time to deal with old galvanized risers inside the house, which often reduce pressure as badly as the service itself.
Getting help
The plumber behind this site replaces water services and main shut-offs in older Waterloo homes, and landlords with pre-war houses near the universities can bundle it with rental property plumbing work. If lead turns up during an emergency repair, the plumber will say so. For planning numbers, see the Waterloo plumbing cost guide, or book a visit to have the service line looked at.