Environmental Pollutants


Lead is a naturally occurring substance present in many sources in our environment. Past use of lead has led to the widespread presence of lead in the environment, including in soil, food, water and dust inside older homes. Toronto Public Health encourages people to reduce exposure to lead from all sources as much as possible. Lead has been found to cause subtle health effects even at low levels.

What is Lead?

Sources of Lead

Soil and gardening

Lead is often found in urban soils. This page provides you with a Guide to assess your soil and actions to take to reduce your exposure to urban soil contaminants.  

Is Lead harmful for my health?

Harmful Effects of Lead

Everyone is exposed to some level of lead, as it is widely present throughout the environment. There is no safe exposure to lead, so it is best to minimize exposure when ever possible.