City report · Illinois, United States
Naperville Air quality today
Air quality in Naperville currently reads AQI 74 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 74
Moderate
- PM2.5, fine particles (µg/m³)
- 21.4
- tree cover
- 51.1%
- trees in this area
- 160K
- more trees needed
- 0
Measured across a 1.2 mi (2 km) radius around Naperville Park District, Naperville, IL, USA (4.9 sq mi), from a satellite image of Sep 11, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Naperville · AQI 74 (Moderate)
Naperville's tree count comes to 160,375 trees across 4.8 sq mi (12.56 km²) of land, already at or above the 30% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Naperville today: AQI 74, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 08:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · Aurora, 4.9 mi (7.9 km) away
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
21.4
PM10
—
NO₂
—
O₃
—
SO₂
—
CO
—
Data: OpenAQ · AirNow
- Outdoor exercise
- Fine for most people; unusually sensitive people should take long or hard exercise easier
- Windows
- Fine to open; close them if you are sensitive to pollution
- Mask
- Not needed for most people
- Air purifier
- Worth running if you are sensitive
Over the last 7 days, the CAMS air-quality model put Naperville's daily AQI at 30 on average, from 21 on Nov 4 to an hourly peak of 69 on Nov 9.
Where Naperville stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Naperville: Healthy tree cover
51.1% tree cover against a 30% healthy-neighborhood target, across 4.8 sq mi (12.56 km²) of land.
Trees in this area
160,375
Target trees
160,375
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Naperville lost?
Since 2001, the area within 10 km of Naperville has lost about 320 acres (129 hectares) of forest (about 240 football fields): 1.9% of the forest it had in 2000. Most of it (81%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from June 2017 of a 5 × 5 km area about 4 km north of the city center.
- Forest lost since 2001
- 320 acres (129 ha)about 240 football fields
- Share of its forest
- 1.9%of what there was in 2000
- Cleared for good
- 259 acres (105 ha)deforestation: turned into farms, mines or towns
The worst year was 2024, when about 57 acres (23 hectares) of forest were lost.
Acres of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 9 acres (4 ha) | 2 acres (1 ha) | 12 acres (5 ha) |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | 10 acres (4 ha) | under 1 ha | 10 acres (4 ha) |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | 4 acres (2 ha) | under 1 ha | 5 acres (2 ha) |
| 2007 | 5 acres (2 ha) | under 1 ha | 6 acres (3 ha) |
| 2008 | 3 acres (1 ha) | under 1 ha | 4 acres (2 ha) |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | 4 acres (2 ha) |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | under 1 ha | under 1 ha | under 1 ha |
| 2013 | 8 acres (3 ha) | 7 acres (3 ha) | 16 acres (6 ha) |
| 2014 | 5 acres (2 ha) | under 1 ha | 5 acres (2 ha) |
| 2015 | 15 acres (6 ha) | under 1 ha | 16 acres (6 ha) |
| 2016 | 5 acres (2 ha) | under 1 ha | 7 acres (3 ha) |
| 2017 | 26 acres (10 ha) | under 1 ha | 27 acres (11 ha) |
| 2018 | 17 acres (7 ha) | under 1 ha | 19 acres (8 ha) |
| 2019 | 21 acres (8 ha) | 4 acres (2 ha) | 25 acres (10 ha) |
| 2020 | 8 acres (3 ha) | 6 acres (2 ha) | 14 acres (6 ha) |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | 25 acres (10 ha) | 7 acres (3 ha) | 32 acres (13 ha) |
| 2023 | 16 acres (7 ha) | under 1 ha | 16 acres (7 ha) |
| 2024 | 56 acres (23 ha) | under 1 ha | 57 acres (23 ha) |
| 2025 | 20 acres (8 ha) | 17 acres (7 ha) | 36 acres (15 ha) |
What is causing deforestation around Naperville?
- Towns and roadscleared for good68% · 216 acres (87 ha)
- Farms, pasture and plantationscleared for good13% · 43 acres (17 ha)
- Loggingcan grow back5.1% · 16 acres (7 ha)
Also: mining and energy, 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
- 33,000 acres (13,400 ha)
- Forest in 2020
- 34,400 acres (13,900 ha)
- Overall change
- +1,370 acres (554 ha)more forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Naperville grew from about 33,000 acres (13,400 hectares) to 34,400 acres (13,900 hectares), a net gain of about 1,370 acres (554 hectares) (+4.1%). New forest grew on about 2,100 acres (850 hectares), while 729 acres (295 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
In the same region
Measured cities near Naperville
Same 2 km radius, same index — so they compare directly.
- Aurora14.6 km
United States
- Tree cover
- 39%
- Air quality
- 74
- Joliet29.5 km
United States
- Tree cover
- 36%
- Air quality
- 70
- Elgin30.1 km
United States
- Tree cover
- 47%
- Air quality
- 69
- Chicago41.8 km
United States
- Tree cover
- 8%
- Air quality
- 113
- Kenosha92.8 km
United States
- Tree cover
- 25%
- Air quality
- 61
- Rockford95.0 km
United States
- Tree cover
- 40%
- Air quality
- 79
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Frequently asked
Questions about Naperville
What is the air quality (AQI) in Naperville right now?
The latest reading for Naperville shows an AQI of 74 (Moderate), measured Nov 11, 08:00 local time by the Aurora ground monitoring station, 4.9 mi (7.9 km) away, via OpenAQ. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Naperville today?
At AQI 74 (Moderate): fine for most people; unusually sensitive people should take long or hard exercise easier. Windows: fine to open; close them if you are sensitive to pollution. Masks: not needed for most people. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Naperville been like this week?
Over the last 7 days, the CAMS air-quality model put Naperville's daily AQI at 30 on average, from 21 on Nov 4 to an hourly peak of 69 on Nov 9. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Naperville lost since 2001?
Since 2001, the area within 10 km of Naperville has lost about 320 acres (129 hectares) of forest (about 240 football fields): 1.9% of the forest it had in 2000. Most of it (81%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Naperville grew from about 33,000 acres (13,400 hectares) to 34,400 acres (13,900 hectares), a net gain of about 1,370 acres (554 hectares) (+4.1%). New forest grew on about 2,100 acres (850 hectares), while 729 acres (295 hectares) were lost.
What is the tree count in Naperville?
Naperville has an estimated 160,375 trees across the 4.8 sq mi (12.56 km²) of land measured — 51.1% tree cover, already past the 30% tree-cover target set for this area.
How many more trees does Naperville need?
Naperville has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Naperville's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Naperville Park District, 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 1.2 mi (2 km) radius around Naperville Park District; the tree count is an estimate derived from that cover.
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