City report · Lombardy, Italy
Monza Air quality today
Air quality in Monza currently reads AQI 136 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
Air quality right now
AQI 136
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 49.8
- tree cover
- 33.9%
- trees in this area
- 107K
- more trees needed
- 3.5K
Measured across a 2 km radius around San Carlo - San Giuseppe, 20900 Monza, Province of Monza and Brianza, Italy (12.57 km²), from a satellite image of Sep 22, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Monza · AQI 136 (Unhealthy for sensitive groups)
Monza's tree count comes to 106,500 trees across 12.57 km², 1 points below the 35% tree-cover level considered healthy for this area, so roughly 3,456 more trees would close the gap.
Air quality detail
Air quality in Monza today: AQI 136, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 17:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Porta Venezia, 12.4 km away · median of 4 stations
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
49.8
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirGradient, AA, Matteo, nur
- Outdoor exercise
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise
- Windows
- Close them to keep the outside air out
- Mask
- Sensitive groups: an N95 outdoors
- Air purifier
- Run one, especially in bedrooms
Over the last 7 days, the CAMS air-quality model put Monza's daily AQI at 116 on average, from 92 on Nov 7 to an hourly peak of 160 on Nov 6.
Where Monza stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Monza: Below target
33.9% tree cover against a 35% healthy-neighborhood target, across 12.57 km².
Trees in this area
106,500
Target trees
109,956
More trees needed
3,456
CO₂ if planted / yr
76.0 t
Deforestation · 2001–2025
How much forest has Monza lost?
Since 2001, the area within 10 km of Monza has lost about 68 hectares of forest (about 95 football pitches): 5.4% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 12 hectares (18%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from August 2017 of a 5 × 5 km area about 7 km northeast of the city center.
- Forest lost since 2001
- 68 haabout 95 football pitches
- Share of its forest
- 5.4%of what there was in 2000
- Cleared for good
- 12 hadeforestation: turned into farms, mines or towns
The worst year was 2023, when about 28 hectares of forest were lost.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | under 1 ha | 1 ha | 2 ha |
| 2002 | under 1 ha | 1 ha | 1 ha |
| 2003 | under 1 ha | 2 ha | 3 ha |
| 2004 | under 1 ha | under 1 ha | 1 ha |
| 2005 | 1 ha | under 1 ha | 1 ha |
| 2006 | under 1 ha | under 1 ha | 1 ha |
| 2007 | 1 ha | under 1 ha | 2 ha |
| 2008 | under 1 ha | under 1 ha | 1 ha |
| 2009 | 4 ha | 2 ha | 5 ha |
| 2010 | under 1 ha | 4 ha | 4 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | 2 ha | 3 ha |
| 2013 | under 1 ha | under 1 ha | under 1 ha |
| 2014 | under 1 ha | under 1 ha | under 1 ha |
| 2015 | under 1 ha | under 1 ha | under 1 ha |
| 2016 | under 1 ha | under 1 ha | under 1 ha |
| 2017 | under 1 ha | 1 ha | 1 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | under 1 ha | under 1 ha | under 1 ha |
| 2020 | under 1 ha | under 1 ha | under 1 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | under 1 ha | 28 ha | 28 ha |
| 2024 | under 1 ha | 3 ha | 3 ha |
| 2025 | under 1 ha | 7 ha | 8 ha |
What is causing deforestation around Monza?
- Loggingcan grow back61% · 41 ha
- Towns and roadscleared for good16% · 11 ha
- Farms, pasture and plantationscleared for good1.5% · 1 ha
Also: unknown causes.
Causes for 2025 are estimates, based on what caused forest loss in the same places up to 2024.
Forest gained and lost, 2000–2020
- Forest in 2000
- 5,450 ha
- Forest in 2020
- 6,810 ha
- Overall change
- +1,360 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Monza grew from about 5,450 hectares to 6,810 hectares, a net gain of about 1,360 hectares (+25%). New forest grew on about 1,390 hectares, while 31 hectares were lost.
These 2000 and 2020 maps, from the University of Maryland, count any land with trees taller than 5 m as forest, including plantations and orchards. Forest that was cut or burned and had grown back by 2020 counts in both years, so the loss here is smaller than the yearly figures.
These figures cover everything within 10 km of the city center, a wider area than the report above, because forest is usually lost at a city's edges.
Source: Hansen/UMD/Google/USGS/NASA, Global Forest Change (GFC-2025-v1.13); causes: WRI/Google DeepMind drivers of forest loss; both CC BY 4.0, summed by Airleaf for each area. Forest gained and lost 2000–2020: Potapov et al. 2022, UMD GLAD Global Land Cover and Land Use Change, CC BY 4.0. Images: contains modified Copernicus Sentinel data. How it's measured
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Frequently asked
Questions about Monza
What is the air quality (AQI) in Monza right now?
The latest reading for Monza shows an AQI of 136 (Unhealthy for sensitive groups), measured Nov 11, 17:00 local time by 4 ground monitoring stations via OpenAQ (the median of their readings; the nearest is Porta Venezia, 12.4 km away). The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Monza today?
At AQI 136 (Unhealthy for sensitive groups): children, older adults and people with asthma or heart disease should cut down long or hard exercise. Windows: close them to keep the outside air out. Masks: sensitive groups: an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Monza been like this week?
Over the last 7 days, the CAMS air-quality model put Monza's daily AQI at 116 on average, from 92 on Nov 7 to an hourly peak of 160 on Nov 6. On 4 of those days the average was above 100, unhealthy for sensitive groups.
How much forest has the area around Monza lost since 2001?
Since 2001, the area within 10 km of Monza has lost about 68 hectares of forest (about 95 football pitches): 5.4% of the forest it had in 2000. Most of it was lost to logging, so much of it can grow back. About 12 hectares (18%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Monza grew from about 5,450 hectares to 6,810 hectares, a net gain of about 1,360 hectares (+25%). New forest grew on about 1,390 hectares, while 31 hectares were lost.
What is the tree count in Monza?
Monza has an estimated 106,500 trees across the 12.57 km² measured — 33.9% tree cover, 1 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Monza need?
Monza needs roughly 3,456 more trees to close a 1-point shortfall against its 35% tree-cover target — about 76.0 t of extra CO₂ absorbed per year once grown.
How are Monza's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near San Carlo - San Giuseppe, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around San Carlo - San Giuseppe; the tree count is an estimate derived from that cover.
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