Air quality comparison · United States and Canada, 52.2 mi (84 km) apart
Toledo, OH vs Windsor Air quality index (AQI) today
Toledo, OH has cleaner air than Windsor right now: AQI 62 (Moderate) against 113 (Unhealthy for sensitive groups).
That puts them in different EPA bands, so the health advice differs today. Over the past 7 days, on modeled daily averages, Toledo, OH averaged AQI 21 against 28, and it was the cleaner of the two on 6 of those days. Toledo, OH has lost more forest since 2001. Toledo, OH has more tree cover.
United States
AQI 62
Moderate
Cleaner right now
- PM2.5
- 15.1 µg/m³1.0× WHO guideline
- Main pollutant
- PM2.5
- Source
- Ground station
- Reading
- Nov 11, 11:00 local
Canada
AQI 113
Unhealthy for sensitive groups
Cleaner right now
- PM2.5
- 22.1 µg/m³1.5× WHO guideline
- Main pollutant
- PM10
- Source
- Ground station
- Reading
- Nov 11, 11:00 local
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Toledo, OH62Windsor113
Head to head
Toledo, OH vs Windsor at a glance
Toledo, OH is ahead on 5 of 6 measures, and Windsor on 1. The better figure in each row is marked.
| Toledo, OH | Windsor | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 62 (better) | 113 |
| PM2.5Fine particles, µg/m³. | 15.1 (better) | 22.1 |
| Past week's averageUS AQI, 7 days. | 21 (better) | 28 |
| Forest lost since 2001Within 10 km of the center. | 173 acres (70 ha) | 40 ha (better) |
| Tree coverWithin 1.2 mi (2 km) of the center. | 34.8% (better) | 25.6% |
| Trees still neededTo reach a healthy canopy. | 0 (better) | 29.4K |
Air quality today
What is the air like in Toledo, OH and Windsor right now?
Toledo, OH has cleaner air than Windsor right now: AQI 62 (Moderate) against 113 (Unhealthy for sensitive groups). PM2.5 is setting the index in Toledo, OH, and PM10 in Windsor.
Toledo, OH's PM2.5 is about 1.0× the WHO's 24-hour guideline of 15 µg/m³. Windsor's PM2.5 is about 1.5× the WHO's 24-hour guideline of 15 µg/m³.
Both readings come from nearby ground stations.
Toledo, OHWindsor
Concentrations at the same moment as the index above, for the pollutants both places report. Lower is better. The dark marks on the PM2.5 and PM10 rows show the WHO's 24-hour guidelines (15 and 45 µg/m³).
The past week
Which had cleaner air over the past 7 days?
Over the past 7 days, on modeled daily averages, Toledo, OH averaged AQI 21 against 28, and it was the cleaner of the two on 6 of those days. A single reading can catch a city on a bad afternoon; the week says whether it was the weather or the place.
- Cleaner days
- Toledo, OH6Windsor0
- Average AQI
- Toledo, OH21Windsor28
- Worst day, AQI
- Toledo, OH30Windsor39
The daily numbers (7 days)
| Day | Toledo, OH | Windsor |
|---|---|---|
| Nov 4 | 13 | 23 |
| Nov 5 | 20 | 28 |
| Nov 6 | 18 | 18 |
| Nov 7 | 16 | 22 |
| Nov 8 | 30 | 34 |
| Nov 9 | 29 | 39 |
| Nov 10 | 24 | 34 |
Daily averages from the CAMS atmospheric model for both places, so the week compares like with like. They can differ from today's reading at the top of the page wherever that comes from a ground station.
What it means today
Is it safe to go outside in Toledo, OH and Windsor today?
Toledo, OH (AQI 62, Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Windsor (AQI 113, Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Exercise outdoors
- Toledo, OH
- Fine for most people; unusually sensitive people should take long or hard exercise easier.
- Windsor
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise.
Windows
- Toledo, OH
- Fine to open; close them if you are sensitive to pollution.
- Windsor
- Close them to keep the outside air out.
Masks
- Toledo, OH
- Not needed for most people.
- Windsor
- Sensitive groups: an N95 outdoors.
Air purifier
- Toledo, OH
- Worth running if you are sensitive.
- Windsor
- Run one, especially in bedrooms.
Against everywhere else
How do Toledo, OH and Windsor compare with the rest of the world?
Right now Toledo, OH's air is cleaner than 45% of the 5,420 places Airleaf tracks, and Windsor's is cleaner than 18%.
Cleaner air than…
- Toledo, OH
- Beats 45%
- Windsor
- Beats 18%
More tree cover than…
- Toledo, OH
- Beats 77%
- Windsor
- Beats 59%
Includes model estimates as well as station readings, so it can differ from our most polluted and cleanest air rankings, which use station readings only.
Deforestation · 2001–2025
Which has lost more forest, Toledo, OH or Windsor?
Toledo, OH has lost more: about 173 acres (70 ha) of forest within 10 km of its center from 2001 to 2025, against 40 ha around Windsor. 143 acres (58 ha) of that was cleared for good, for farms, mines or towns.
Measured within 10 km of each center, from the yearly satellite maps of forest loss: a wider circle than the one for tree cover, because forest is usually lost at a city's edges.
Worst year: 2022, with 22 acres (9 ha) lost.
Worst year: 2012, with 11 ha lost.
| Toledo, OH | Windsor | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 173 acres (70 ha) | 40 ha (better) |
| Share of its forestOf what it had in 2000. | 1.9% (better) | 2.3% |
| Cleared for goodTurned into farms, mines or towns. | 143 acres (58 ha) | 33 ha (better) |
| Recent trend2021–2025 against the five years before. | Too little to call | Too little to call |
| Main known cause | Towns and roads (82%) | Towns and roads (72%) |
Satellite timelapses
Watch both change, year by year
A clear satellite photo a year of the land around each city. Press play, turn on the forest cleared since the first year, or drag the before and after.
Toledo, OH
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
Windsor
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
Trees
Which has more trees, Toledo, OH or Windsor?
Toledo, OH has more tree cover: 34.8% of the land within 1.2 mi (2 km) of its center against 25.6% around Windsor, or about 109,327 trees against 79,942.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Toledo, OH | Windsor | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 109K (better) | 79.9K |
| Trees still neededTo reach the target. Fewer is better. | 0 (better) | 29.4K |
| CO₂ absorbed each yearBy the trees already standing. | 2.4M kg (better) | 1.8M kg |
Tree cover on the satellite image
The same 1.2 mi (2 km) radius around each center, with the tree cover the satellite found marked on it.
Reading these numbers
How this comparison is made
Air quality index
The US EPA index, computed from current pollutant concentrations: ground stations where a place has them nearby, and the CAMS atmospheric model everywhere else. It moves hour to hour, so it is a snapshot rather than a verdict on either place. The guideline marks are from the WHO's 2021 air quality guidelines.
Trees and forest
Tree cover is the share of ground under canopy within 1.2 mi (2 km) of each center, read from Sentinel-2 satellite imagery at 10 m detail. It measures that circle, not the whole municipality, which is what makes the two comparable. Forest loss comes from the University of Maryland's Global Forest Change maps.
More on the method on the About Airleaf page.
Frequently asked
Toledo, OH vs Windsor: your questions answered
Is Toledo, OH cleaner than Windsor?
On air quality, yes, right now: Toledo, OH reads AQI 62 against 113, a gap of 51 points on the US EPA index. This is a live reading rather than an annual average, so it can reverse within a day. Over the past 7 days, on modeled daily averages, Toledo, OH averaged AQI 21 against 28, and it was the cleaner of the two on 6 of those days.
Is it safe to exercise outdoors in Toledo, OH and Windsor today?
In Toledo, OH, at AQI 62: Unusually sensitive people should consider limiting long outdoor exertion. In Windsor, at AQI 113: Sensitive groups should limit long or intense outdoor activity.
Which has lost more forest, Toledo, OH or Windsor?
Toledo, OH has lost more: about 173 acres (70 ha) of forest within 10 km of its center from 2001 to 2025, against 40 ha around Windsor. 143 acres (58 ha) of that was cleared for good, for farms, mines or towns.
Which has more trees, Toledo, OH or Windsor?
Toledo, OH has more tree cover: 34.8% of the land within 1.2 mi (2 km) of its center against 25.6% around Windsor, or about 109,327 trees against 79,942. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Toledo, OH and Windsor need?
Toledo, OH needs about 0 more to reach its canopy target of 30%, and Windsor about 29,354 to reach 35%. The target starts at 30% of the land and rises where air quality is poor.
Are Toledo, OH and Windsor measured the same way?
The method is the same: the US EPA index for air, and Sentinel-2 satellite imagery at 10 m detail over an identical radius for trees. Both readings come from nearby ground stations. Nothing is adjusted for population, city limits or climate.
How often does the Toledo, OH vs Windsor comparison update?
The air readings refresh about once an hour, and each reading's local time is shown at the top of the page. Tree cover comes from the latest clear satellite image of each area (Aug 28, 2026 and Aug 28, 2026), and the forest figures are published yearly.
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