Drinking water quality and enforcement

Ontario has a comprehensive set of measures and regulations to help ensure the safety of drinking water.

The following dataset contains information about the drinking water systems, laboratories and facilities the Ministry of the Environment, Conservation and Parks is responsible for monitoring to ensure compliance with Ontario's drinking water laws.

The dataset includes information about:

  • the number and type of registered systems and laboratories
  • drinking water quality test results
  • adverse water quality incidents
  • activities to support reduced lead in drinking water
  • enforcement activities related to inspections
  • orders and convictions
  • system operator certification

For more information


Data Available

The data described here is available for you to use. [Learn more]
[See the licence for how you're allowed to use this data.]

Fiscal: 2021 - 2022

Fiscal: 2020 - 2021

Fiscal: 2019 - 2020

Fiscal: 2018 - 2019

Fiscal: 2017 - 2018

Fiscal: 2016 - 2017

Fiscal: 2015 - 2016

Fiscal: 2014 - 2015

Supporting Files

Additional Info

Field Value
Geographic coverage Ontario
Geography Breakdown None
Source URL/Address
Author Email
Maintainer branch
Last Validated Date 2021-12-23
Update frequency Yearly
Access instructions