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Homepage of Public Health Ontario(PHO). PHO keeps Ontarians safe and healthy. With our partners in government, public health and health care, we prevent illness and improve health.

Keep your public health knowledge up to date. See Public Health Ontario’s online courses in Health Promotion, Infection Prevention and Control, Emergency Preparedness and more.

Calculates how much bleach product to dilute with water to get your desired concentration (ppm) of chlorine solution.

Interactive tool that provides vaccine safety surveillance data in Ontario by trends over time, age and sex, public health unit, type of vaccine and type of adverse event.

Provides an easy way to calculate the amount of chlorine product that is needed to disinfect a well.

The risk screening tool for ethical appraisal of evidence-generating initiatives helps to identify potential project-associated risks to participants and communities and determines what level of ethics review is required, if any.