Table of Contents
- Why is heavy rainfall a concern?
- Are beaches monitored?
- What happens when water quality is affected?
- When are warning signs posted at a beach?
- When is a beach closed?
- What are the risks of swimming at a posted or closed beach?
Weather is a factor that can affect water quality. Rainfall can wash animal wastes into storm sewers which can then flow into rivers and lakes. This is called run-off. Also, during heavy rainfall, sewage treatment plants can become too full and the extra untreated water can flow directly into rivers and lakes. Run-off, or the outflow of extra water, can dirty the water. Bacteria and other materials may be added into the water and could affect a swimmer’s health and safety.
Not all beaches in Middlesex-London are monitored. The Middlesex-London Health Unit works with owners and operators of local beaches to make sure they are safe for the public. Beach usage is reviewed and water samples are taken accordingly. Notice signs are posted on beaches that are not monitored. See Beach Water Monitoring for public beach postings or closures in Middlesex-London and surrounding areas.