Ontario - Current Air Quality Health Index Observations and Forecasts Today's Air Quality Forecast jointly provided by the Ontario Ministry of the Environment, Conservation and Parks and Environment and Climate Change Canada.2026-04-15T16:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi:202604151600Ontario Ministry of the Environment, Conservation and Parks, Air Monitoring and Transboundary Air Sciences Sectionhttp://www.airqualityontario.comCopyright 2026, Ontario Ministry of the Environment, Conservation and Parks<![CDATA[Barrie: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-47045-1:196912311900<![CDATA[Barrie: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-47045-2:202604151700<![CDATA[Barrie: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-47045-2:202604151700<![CDATA[Belleville: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-54012-2:196912311900<![CDATA[Belleville: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-54012-3:202604151700<![CDATA[Belleville: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-54012-3:202604151700<![CDATA[Brampton: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-46090-3:196912311900<![CDATA[Brampton: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-46090-3:202604151700<![CDATA[Brampton: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-46090-3:202604151700<![CDATA[Brantford: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-21005-3:196912311900<![CDATA[Brantford: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-21005-3:202604151700<![CDATA[Brantford: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-21005-3:202604151700<![CDATA[Burlington: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-44008-2:196912311900<![CDATA[Burlington: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-44008-3:202604151700<![CDATA[Burlington: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-44008-3:202604151700<![CDATA[Centre-ville de Hamilton: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-29000-4:196912311900<![CDATA[Centre-ville de Hamilton: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-29000-3:202604151700<![CDATA[Centre-ville de Hamilton: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-29000-3:202604151700<![CDATA[Centre-ville de Toronto: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-31129-5:196912311900<![CDATA[Centre-ville de Toronto: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-31129-4:202604151700<![CDATA[Centre-ville de Toronto: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-31129-3:202604151700<![CDATA[Centre-ville de Windsor: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-12008-3:196912311900<![CDATA[Centre-ville de Windsor: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-12008-3:202604151700<![CDATA[Centre-ville de Windsor: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-12008-3:202604151700<![CDATA[Centre-ville d'Ottawa: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-51001-2:196912311900<![CDATA[Centre-ville d'Ottawa: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-51001-2:202604151700<![CDATA[Centre-ville d'Ottawa: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-51001-2:202604151700<![CDATA[Chatham: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-13001-2:196912311900<![CDATA[Chatham: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-13001-3:202604151700<![CDATA[Chatham: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-13001-3:202604151700<![CDATA[Cornwall: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-56051-2:196912311900<![CDATA[Cornwall: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-56051-2:202604151700<![CDATA[Cornwall: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-56051-2:202604151700<![CDATA[Dorset: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-49010-1:196912311900<![CDATA[Dorset: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-49010-2:202604151700<![CDATA[Dorset: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-49010-2:202604151700<![CDATA[Grand Bend: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-15020-3:196912311900<![CDATA[Grand Bend: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-15020-2:202604151700<![CDATA[Grand Bend: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-15020-2:202604151700<![CDATA[Guelph: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-28028-3:196912311900<![CDATA[Guelph: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-28028-3:202604151700<![CDATA[Guelph: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-28028-3:202604151700<![CDATA[Hamilton Mountain: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-29214-3:196912311900<![CDATA[Hamilton Mountain: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-29214-3:202604151700<![CDATA[Hamilton Mountain: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-29214-3:202604151700<![CDATA[Hamilton-Ouest: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-29118-3:196912311900<![CDATA[Hamilton-Ouest: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-29118-3:202604151700<![CDATA[Hamilton-Ouest: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-29118-3:202604151700<![CDATA[Kingston: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-52023-2:196912311900<![CDATA[Kingston: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-52023-3:202604151700<![CDATA[Kingston: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-52023-3:202604151700<![CDATA[Kitchener: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-26060-3:196912311900<![CDATA[Kitchener: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-26060-3:202604151700<![CDATA[Kitchener: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-26060-3:202604151700<![CDATA[London: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-15026-3:196912311900<![CDATA[London: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-15026-3:202604151700<![CDATA[London: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-15026-3:202604151700<![CDATA[Milton: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-44029-3:196912311900<![CDATA[Milton: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-44029-3:202604151700<![CDATA[Milton: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-44029-3:202604151700<![CDATA[Mississauga: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-46108-3:196912311900<![CDATA[Mississauga: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-46108-3:202604151700<![CDATA[Mississauga: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-46108-3:202604151700<![CDATA[Newmarket : Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-48006-3:196912311900<![CDATA[Newmarket : Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-48006-3:202604151700<![CDATA[Newmarket : Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-48006-3:202604151700<![CDATA[North Bay: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-75010-1:196912311900<![CDATA[North Bay: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-75010-2:202604151700<![CDATA[North Bay: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-75010-2:202604151700<![CDATA[Oakville : Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-44017-3:196912311900<![CDATA[Oakville : Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-44017-3:202604151700<![CDATA[Oakville : Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-44017-3:202604151700<![CDATA[Oshawa: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-45027-2:196912311900<![CDATA[Oshawa: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-45027-3:202604151700<![CDATA[Oshawa: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-45027-3:202604151700<![CDATA[Parry Sound: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-49005-1:196912311900<![CDATA[Parry Sound: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-49005-2:202604151700<![CDATA[Parry Sound: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-49005-2:202604151700<![CDATA[Peterborough: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-59006-2:196912311900<![CDATA[Peterborough: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-59006-3:202604151700<![CDATA[Peterborough: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-59006-3:202604151700<![CDATA[Port Stanley: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-16015-3:196912311900<![CDATA[Port Stanley: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-16015-3:202604151700<![CDATA[Port Stanley: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-16015-3:202604151700<![CDATA[Sarnia: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-14111-3:196912311900<![CDATA[Sarnia: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-14111-2:202604151700<![CDATA[Sarnia: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-14111-2:202604151700<![CDATA[Sault Ste Marie: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-71078-2:196912311900<![CDATA[Sault Ste Marie: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-71078-2:202604151700<![CDATA[Sault Ste Marie: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-71078-2:202604151700<![CDATA[St. Catharines: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-27067-3:196912311900<![CDATA[St. Catharines: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-27067-3:202604151700<![CDATA[St. Catharines: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-27067-3:202604151700<![CDATA[Sudbury: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-77233-1:196912311900<![CDATA[Sudbury: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-77233-2:202604151700<![CDATA[Sudbury: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-77233-2:202604151700<![CDATA[Thunder Bay: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-63200-2:196912311900<![CDATA[Thunder Bay: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-63200-2:202604151700<![CDATA[Thunder Bay: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-63200-2:202604151700<![CDATA[Tiverton: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-18007-2:196912311900<![CDATA[Tiverton: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-18007-2:202604151700<![CDATA[Tiverton: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-18007-2:202604151700<![CDATA[Toronto-Est: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-33003-3:196912311900<![CDATA[Toronto-Est: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-33003-3:202604151700<![CDATA[Toronto-Est: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-33003-3:202604151700<![CDATA[Toronto-Nord: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-34021-3:196912311900<![CDATA[Toronto-Nord: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-34021-3:202604151700<![CDATA[Toronto-Nord: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-34021-3:202604151700<![CDATA[Toronto-Ouest : Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-35125-3:196912311900<![CDATA[Toronto-Ouest : Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-35125-3:202604151700<![CDATA[Toronto-Ouest : Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-35125-3:202604151700<![CDATA[Windsor-Ouest: Current Observation]]>1969-12-31T19:00:00-05:00tag:airqualityontario.com,1969-12-31:ontario-aqhi-12016-2:196912311900<![CDATA[Windsor-Ouest: Forecast Wednesday Night]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f2-12016-3:202604151700<![CDATA[Windsor-Ouest: Forecast Thursday]]>2026-04-15T17:00:00-04:00tag:airqualityontario.com,2026-04-15:ontario-aqhi-f3-12016-3:202604151700DisclaimerThis 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