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Attention Users

The following tools are currently unavailable: Snapshots, ID Query, STI Lab Data Tool and HAI Query. In addition, external collaboration sites are currently unavailable.

We are working to resolve the issue. Apologies for any inconvenience this may cause.

Online Water Testing Portal

Enter submitter and sample details online and receive drinking water test reports electronically.

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Quick Access

Epidemiological Summary

Epidemiology of measles cases in Ontario with a focus on the current outbreak.

720 KB
Updated 31 July 2025

Interactive Report

This tool provides comprehensive epidemiological information of respiratory virus activity in Ontario, including COVID-19, influenza and other respiratory viruses. Explore case trends, laboratory testing, and outbreaks, as well as COVID-19 outcomes and vaccination.

Webpage
Updated 11 July 2025

Interactive Report

Provides epidemiological information on substance use and harms data in Ontario. Users can explore the most recent 10 years of data for emergency department visits, hospitalizations and deaths. Results can be viewed by public health unit, age, sex, and in some cases, drug type.

Webpage
Updated 30 July 2025

Surveillance Report

Epidemiological summary of legionellosis activity in Ontario, with a focus on 2025 to date, displaying trends over time, by sex and age group, and by public health unit; number of patients tested and percent positivity; and severity indicators.

1.1 MB
Updated 24 July 2025

Best Practice

Infection prevention and control recommendations for veterinary clinics that provide care for animals at risk for highly pathogenic avian influenza infection.

214 KB
Updated 9 June 2025

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