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Ontario Water Profiles

Understand What's in Your Tap Water

Explore official Ontario drinking-water test results, translated into clear, practical information for your community.

Official Ontario data · Up to 1 years of history · Independent summary

0Covered regions
0Local water systems
—Latest reporting period
0Historical years available

Explore Ontario water systems

Select a region on the map or from the list — each one covers every local water system reported within it.

Approximate locations, schematic map — not to scale.

    Browse by region

    How it works

    1

    Find your community

    Search or browse to the region and city your water comes from.

    2

    Review key water indicators

    See lead, E. coli, disinfection byproducts, and more, with plain-language context.

    3

    Compare results with Ontario standards

    Every figure is shown next to the regulatory limit it's measured against.

    Built from official Ontario drinking-water data

    Every figure on this site is derived from the Ontario Ministry of the Environment, Conservation and Parks' Drinking Water Quality and Enforcement dataset, plus aesthetic parameters sourced directly from individual municipalities. This site is an independent summary — it is not affiliated with the Government of Ontario or any municipality, and it is not a real-time water advisory service.

    Source: Ontario Ministry of the Environment, Conservation and Parks — Drinking Water Quality and Enforcement dataset, shared under the Open Government Licence – Ontario. Figures shown are summarized from raw regulatory test results and are not official Ministry publications. This site is an independent project, not affiliated with the Government of Ontario.