Water testing · 6 min
Accredited water testing labs in Ontario
Ontario-focused lab options for well and municipal tap testing — Caduceon, Paracel, Bureau Veritas/Maxxam and AGAT — plus free public-health bacteria testing.
Looking for a lab or free test option? Find a Water Test · Not sure which system you need? Run the Water Problem Wizard for a recommended stack and installed cost ranges.
Ontario shortlist
- **Caduceon Environmental Laboratories** — Ontario-based; often used by municipalities and contractors
- **Paracel Laboratories** — strong reputation for comprehensive panels including PFAS and organics
- **Bureau Veritas** (formerly Maxxam) — large network, widely recognized by homeowners
- **AGAT Laboratories** — national lab with drinking and well-water offerings
Free bacteria testing
Many Ontario public health units provide free or low-cost well bacteria bottles. Use that for routine potability checks, then add paid chemistry when you need design data. See Free well water testing in Ontario.
Municipal taps
For lead or PFAS at the kitchen faucet, book an accredited package — city plant reports are not a substitute for premise sampling.
How WaterFilterHelp fits
We help you discover free vs paid options (Find a Water Test), compare labs, and match a vetted Ontario installer when treatment is the next step. We do not operate a laboratory.