Explorers of the Bruce Trail will encounter water sources such as springs, streams, ponds and lakes at frequent intervals along the Trail. However, water may not be accessible at times.
All water sources found along the Trail should be assumed to be contaminated. Carry water that is known to be safe, and treat any water that must be obtained while on the Trail.
In view of the prevalence of harmful giardia parasites in surface water, the Ontario Ministry of Health recommends the following steps to make this water safe for drinking: boil the water for 1 to 2 minutes or purchase a filter specifically designed to remove giardia.
Ministry officials warn that adding chlorine bleach or treatment tablets to the water will not destroy giardia. Chlorine bleach or treatment tablets are effective in killing coliform and other harmful bacteria, but water should not be consumed until at least 20 minutes after treatment. Consult a pharmacist or outdoor store for advice on purchasing filters and water treatment tablets.