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Air Quality Health Index (AQHI)
All Associations shall cancel, or postpone, official workouts, qualifiers, and races when the Air Quality Health Index (AQHI) is seven (7) or greater, as measured by the nearest Environment Canada monitoring station.
Extreme temperature
Races will be cancelled when a specific temperature is reached.
All Other Weather-Related Measurements
At the beginning of each race season, the Association shall advise the industry which weather source will be used for temperature forecasts, failing which the weather source shall be the Weather Network.
| Association | Weather Source |
|---|---|
| Ajax Downs | Weather Network: Ajax |
| Clinton Raceway | Weather Network: Clinton |
| Dresden Raceway | Weather Network: Dresden |
| Flamboro Downs | Environment Canada: Hamilton |
| Fort Erie Race Track | Accu Weather Buffalo |
| Georgian Downs | Environment Canada: Barrie |
| Grand River Raceway | Weather.com: Elora |
| Hanover Raceway | Weather Network: Hanover |
| Hiawatha Horse Park | Weather Network: Sarnia |
| Kawartha Downs | Weather Network: Peterborough |
| Leamington Raceway | Weather Network: Leamington |
| Mohawk Park | Weather Network: Campbellville |
| Rideau Carleton Raceway | Environment Canada: Ottawa |
| The Raceway at Western Fair | The Weather Network:London |
| Woodbine Racetrack | The Weather Network: Pearson Airport |