AQHI Forecast:

Forecast Issued on:
September 21, 2019

AQHI Forecast for Sunday by Stations.
Station Location AQHI AQHI Category
Barrie83 Perry St.3Low Risk, BarrieLow Risk
Belleville2 Sidney St., Water Treatment Plant4Moderate Risk, BellevilleModerate Risk
Brampton109 Mclaughlin Rd. S.4Moderate Risk, BramptonModerate Risk
Brantford324 Grand River Ave.4Moderate Risk, BrantfordModerate Risk
Chatham435 Grand Ave. W.4Moderate Risk, ChathamModerate Risk
CornwallBedford St. 3rd St. W.3Low Risk, CornwallLow Risk
Dorset1026 Bellwood Acres Rd.3Low Risk, DorsetLow Risk
Grand BendPoint Blake Conservation Area4Moderate Risk, Grand BendModerate Risk
GuelphExhibition St. Clark St. W.3Low Risk, GuelphLow Risk
Milton1120 Main St. E.4Moderate Risk, MiltonModerate Risk
BurlingtonNorth Shore Blvd. E. Lakeshore Rd.4Moderate Risk, BurlingtonModerate Risk
Hamilton DowntownElgin St. Kelly St.4Moderate Risk, Hamilton DowntownModerate Risk
Hamilton Mountain250 Fennell Ave. W.4Moderate Risk, Hamilton MountainModerate Risk
Hamilton WestMain St. W. Hwy 4034Moderate Risk, Hamilton WestModerate Risk
Kingston23 Beechgrove Lane4Moderate Risk, KingstonModerate Risk
KitchenerWest Ave. Homewood Ave.3Low Risk, KitchenerLow Risk
London42 St. Julien St.3Low Risk, LondonLow Risk
Mississauga3359 Mississauga Rd. N., U of T Campus4Moderate Risk, MississaugaModerate Risk
NewmarketEagle St. W. McCaffrey Rd.3Low Risk, NewmarketLow Risk
North BayChippewa St. W., Dept. National Defence3Low Risk, North BayLow Risk
OakvilleEighth Line, Glenashton Dr., Halton Res.4Moderate Risk, OakvilleModerate Risk
OshawaBrittania Ave. W., Ep Taylor Stables4Moderate Risk, OshawaModerate Risk
Ottawa DowntownRideau St. Wurtemburg St.3Low Risk, Ottawa DowntownLow Risk
Parry Sound7 Bay St.3Low Risk, Parry SoundLow Risk
PetawawaPetawawa Research Forest Facility2Low Risk, PetawawaLow Risk
Peterborough10 Hospital Dr.4Moderate Risk, PeterboroughModerate Risk
Port Stanley43665 Dexter Line, Elgin Water T. Plt4Moderate Risk, Port StanleyModerate Risk
Sarnia700 Christina St. N.4Moderate Risk, SarniaModerate Risk
Sault Ste. MarieSault College2Low Risk, Sault Ste. MarieLow Risk
St. CatharinesArgyle Cres., Pump Stn.4Moderate Risk, St. CatharinesModerate Risk
Sudbury155 Elm Street3Low Risk, SudburyLow Risk
Thunder Bay421 James St. S.2Low Risk, Thunder BayLow Risk
Tiverton4th Concession, Bruce Rd. 233Low Risk, TivertonLow Risk
Toronto DowntownBay St. Wellesley St. W.5Moderate Risk, Toronto DowntownModerate Risk
Toronto EastKennedy Rd. Lawrence Ave. E.5Moderate Risk, Toronto EastModerate Risk
Toronto North4905 Dufferin St., Eccc5Moderate Risk, Toronto NorthModerate Risk
Toronto West125 Resources Rd.5Moderate Risk, Toronto WestModerate Risk
Windsor Downtown467 University Ave. W.5Moderate Risk, Windsor DowntownModerate Risk
Windsor WestCollege Ave. South St.5Moderate Risk, Windsor WestModerate Risk

Forecast: Ontario's Air Quality Health Index

  • Environment Canada location AQHI forecasts updated at 5:00 pm EDT September 21, 2019.

The AQHI is a health protection tool that is designed to help you make decisions to protect your health by limiting short-term exposure to air pollution and adjusting your activity levels during increased levels of air pollution. It is based on the following pollutants in our air: Ozone (O3), Fine Particulate Matter (PM2.5), Nitrogen Dioxide (NO2).

Maps: Air Quality Health Index by Location

Tables: Air Quality Health Index by Location

Current Observations and Forecasts

Note: The Air Quality Health Index on this web page are based on automatically polled data and have not undergone final verification.

Note: N/A (Not Available) denotes invalid or missing data.

Air Quality Health Index (AQHI) Categories

Air Quality Health Index Categories, Values and Associated Colours
Air Quality Health Index Categories and Values
Low Risk
(1 - 3)
Moderate Risk
(4 - 6)
High Risk
(7 - 10)
Very High Risk

Air Quality Health Index Categories and Health Messages

The table below provides the health messages for each category of the Air Quality Health Index for the "at risk" population and the general population.
Health Risk Air Quality Health Index Health Messages
At Risk Population* General Population
Low 1 - 3 Enjoy your usual outdoor activities. Ideal air quality for outdoor activities.
Moderate 4 - 6 Consider reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms. No need to modify your usual outdoor activities unless you experience symptoms such as coughing and throat irritation.
High 7 - 10 Reduce or reschedule strenuous activities outdoors. Children and the elderly should also take it easy. Consider reducing or rescheduling strenuous activities outdoors if you experience symptoms such as coughing and throat irritation.
Very High Above 10 Avoid strenuous activities outdoors. Children and the elderly should also avoid outdoor physical exertion. Reduce or reschedule strenuous activities outdoors, especially if you experience symptoms such as coughing and throat irritation.

* People with heart or breathing problems are at greater risk. Follow your doctor's usual advice about exercising and managing your condition.