WildfireSmokeCanada

Ontario — air quality right now

Every monitor in one view · PM2.5 only · updated Sep 20, 3:58PM EDT

Right now

93555125225
3 µg/m³ Good

Median NowCast across reporting stations

Worst right now: Cornwall — 5 µg/m³ (Good)

40 of 40 stations reporting in the last 6 hours

Stations by air-quality category 40 reporting

Good: 40
Good · 40

Highest readings right now

Cornwall5 µg/m³Good
Windsor West4 µg/m³Good
Windsor Downtown4 µg/m³Good
Hamilton Downtown3 µg/m³Good
Toronto Downtown3 µg/m³Good
All stations (40)
StationNowCastCategory48 h forecast peak
Cornwall5 µg/m³Good7 µg/m³
Windsor West4 µg/m³Good5 µg/m³
Windsor Downtown4 µg/m³Good5 µg/m³
Hamilton Downtown3 µg/m³Good12 µg/m³
Toronto Downtown3 µg/m³Good14 µg/m³
London3 µg/m³Good5 µg/m³
Port Stanley3 µg/m³Good3 µg/m³
Chatham3 µg/m³Good3 µg/m³
Oakville3 µg/m³Good8 µg/m³
Burlington3 µg/m³Good8 µg/m³
Parry Sound3 µg/m³Good1 µg/m³
Sarnia3 µg/m³Good3 µg/m³
Hamilton West3 µg/m³Good5 µg/m³
St. Catharines3 µg/m³Good6 µg/m³
Kingston3 µg/m³Good3 µg/m³
Hamilton Mountain3 µg/m³Good5 µg/m³
Kitchener3 µg/m³Good5 µg/m³
Grand Bend3 µg/m³Good2 µg/m³
Guelph3 µg/m³Good4 µg/m³
Egbert3 µg/m³Good2 µg/m³
Tiverton3 µg/m³Good1 µg/m³
Barrie3 µg/m³Good2 µg/m³
Toronto East3 µg/m³Good11 µg/m³
Newmarket3 µg/m³Good2 µg/m³
Brantford3 µg/m³Good4 µg/m³
Mississauga3 µg/m³Good14 µg/m³
North Bay3 µg/m³Good2 µg/m³
Brampton3 µg/m³Good8 µg/m³
Ottawa Downtown3 µg/m³Good17 µg/m³
Belleville2 µg/m³Good2 µg/m³
Toronto West2 µg/m³Good9 µg/m³
Toronto North2 µg/m³Good6 µg/m³
Dorset2 µg/m³Good1 µg/m³
Sault Ste Marie2 µg/m³Good7 µg/m³
Peterborough2 µg/m³Good4 µg/m³
Milton2 µg/m³Good6 µg/m³
Sudbury2 µg/m³Good4 µg/m³
Oshawa2 µg/m³Good4 µg/m³
Thunder Bay2 µg/m³Good15 µg/m³
Bonner Lake1 µg/m³Good2 µg/m³

City forecast pages — Ontario

Toronto · Ottawa · Hamilton · Mississauga · London · Kitchener-Waterloo · Guelph · Windsor · Barrie · Kingston · Belleville · Sault Ste. Marie · Parry Sound · Thunder Bay

Wildfires across the province or territory

Province-wide

Fire snapshot updated 2026-09-20 19:50 UTC

Agencies report 37 active incidents: 28 Out of control · 9 Under control.

Out of control28 fires
FOR_FIRE_015
42273 ha · reported 2026-08-26 · ON
Out of control
SLK_FIRE_005
38305.7 ha · reported 2026-07-18 · ON
Out of control
FOR_FIRE_013
25476 ha · reported 2026-08-26 · ON
Out of control
NIP_FIRE_018
24541.7 ha · reported 2026-07-23 · ON
Out of control
SLK_FIRE_072
23597.1 ha · reported 2026-09-17 · ON
Out of control
NIP_FIRE_045
9922 ha · reported 2026-07-19 · ON
Out of control
RED_FIRE_024
6414.9 ha · reported 2026-08-09 · ON
Out of control
FOR_FIRE_037
3448 ha · reported 2026-07-19 · ON
Out of control
NIP_FIRE_048
1237 ha · reported 2026-07-24 · ON
Out of control
COC_FIRE_049
1012.5 ha · reported 2026-08-03 · ON
Out of control
SLK_FIRE_021
858.9 ha · reported 2026-08-04 · ON
Out of control
RED_FIRE_023
638 ha · reported 2026-08-09 · ON
Out of control
COC_FIRE_043
500 ha · reported 2026-08-19 · ON
Out of control
NIP_FIRE_047
444.4 ha · reported 2026-07-24 · ON
Out of control
THU_FIRE_060
419 ha · reported 2026-08-15 · ON
Out of control
COC_FIRE_040
400 ha · reported 2026-07-14 · ON
Out of control
NIP_FIRE_025
254 ha · reported 2026-07-22 · ON
Out of control
NIP_FIRE_052
200 ha · reported 2026-07-19 · ON
Out of control
COC_FIRE_038
100 ha · reported 2026-07-14 · ON
Out of control
FOR_FIRE_039
95.8 ha · reported 2026-07-31 · ON
Out of control
NIP_FIRE_075
40 ha · reported 2026-07-19 · ON
Out of control
COC_FIRE_048
25 ha · reported 2026-07-29 · ON
Out of control
NIP_FIRE_074
15 ha · reported 2026-07-19 · ON
Out of control
NIP_FIRE_080
10 ha · reported 2026-07-21 · ON
Out of control
COC_FIRE_019
5 ha · reported 2026-06-29 · ON
Out of control
FOR_FIRE_045
3.5 ha · reported 2026-09-01 · ON
Out of control
NIP_FIRE_087
1.5 ha · reported 2026-07-31 · ON
Out of control
NIP_FIRE_107
0.1 ha · reported 2026-08-29 · ON
Out of control
Being held0 fires

No being held fires are reported in this province or territory.

Under control9 fires
THU_FIRE_036
301240 ha · reported 2026-09-17 · ON
Under control
FOR_FIRE_014
51928.3 ha · reported 2026-09-04 · ON
Under control
DRY_FIRE_034
45800 ha · reported 2026-09-16 · ON
Under control
DRY_FIRE_035
30158.6 ha · reported 2026-09-16 · ON
Under control
THU_FIRE_056
7947 ha · reported 2026-09-09 · ON
Under control
NIP_FIRE_012
2821 ha · reported 2026-09-16 · ON
Under control
DRY_FIRE_036
1710 ha · reported 2026-08-08 · ON
Under control
NIP_FIRE_016
1474.2 ha · reported 2026-08-11 · ON
Under control
NIP_FIRE_013
500.4 ha · reported 2026-08-11 · ON
Under control

Sources: BC Wildfire Service in British Columbia; Natural Resources Canada CWFIS elsewhere.