Pool Fouling

When a major fouling occurs, specific steps must be taken to ensure proper disinfection. 

A closure is necessary to reduce health risks associated with pool fouling, particularly those presented by cryptosporidium, a parasite found in diarrhea known to cause gastrointestinal illness. 

The Lifesaving Society and public health recommend steps for public pool operators in such situations. These include raising the chlorine levels to 20 ppm (parts per million) and maintaining them at that level for a minimum of 13 hours. 

The pool can reopen once the chemicals reach the levels mandated by Public Pool Regulation 565. This can be challenging to achieve. To expedite this, a portion of the pool water needs to be drained and fresh water added.

Read more:

• Haldimand-Norfolk Health Unit: Disinfection Procedures for a Pool Fouling
• Lifesaving Society:  Safety Standards for Canadian Swimming Pools and Waterfronts 
• Ontario Public Pools Regulations:  Health Protection and Promotion Act