City report · Benin
Porto-Novo Air quality today
Air quality in Porto-Novo currently reads AQI 152 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 152
Unhealthy
- PM2.5, fine particles (µg/m³)
- 68.1
- tree cover
- 12.3%
- trees in this area
- 38.6K
- more trees needed
- 87.0K
Measured across a 2 km radius around Porto-Novo, Benin (12.57 km²), from a satellite image of Oct 1, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Porto-Novo · AQI 152 (Unhealthy)
Porto-Novo's tree count comes to 38,642 trees across 12.57 km², 28 points below the 40% tree-cover level considered healthy for this area, so roughly 87,022 more trees would close the gap.
Air quality detail
Air quality in Porto-Novo today: AQI 152, Unhealthy
Main pollutant: PM2.5 · Observed Nov 10, 21:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 85 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 4 station cities within 85 km, e.g. Ojo, Lagos, Nigeria and Ota
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
68.1
PM10
34.5
NO₂
12.1
O₃
37.0
SO₂
2.1
CO
301.0
- Outdoor exercise
- Everyone should cut down long or hard exercise; sensitive groups should avoid it
- Windows
- Keep them closed
- Mask
- Wear an N95 outdoors
- Air purifier
- Run one
Over the last 7 days, the CAMS air-quality model put Porto-Novo's daily AQI at 63 on average, from 59 on Nov 5 to an hourly peak of 95 on Nov 8.
Where Porto-Novo stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Porto-Novo: Critically low
12.3% tree cover against a 40% healthy-neighborhood target, across 12.57 km².
Trees in this area
38,642
Target trees
125,664
More trees needed
87,022
CO₂ if planted / yr
1,914 t
Deforestation · 2001–2025
How much forest has Porto-Novo lost?
Since 2001, the area within 10 km of Porto-Novo has lost about 57 hectares of forest (about 79 football pitches): 12% of the forest it had in 2000. Most of it (95%) was deforestation, forest cleared for good, mainly for towns and roads.
2017: satellite photo from January 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 57 haabout 79 football pitches
- Share of its forest
- 12%of what there was in 2000
- Cleared for good
- 54 hadeforestation: turned into farms, mines or towns
The worst year was 2012, when about 14 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 | 3 ha | under 1 ha | 3 ha |
| 2002 | 3 ha | under 1 ha | 3 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | 1 ha |
| 2005 | 2 ha | under 1 ha | 2 ha |
| 2006 | 2 ha | under 1 ha | 2 ha |
| 2007 | 3 ha | under 1 ha | 4 ha |
| 2008 | 5 ha | under 1 ha | 5 ha |
| 2009 | 2 ha | under 1 ha | 2 ha |
| 2010 | 1 ha | under 1 ha | 2 ha |
| 2011 | 5 ha | under 1 ha | 5 ha |
| 2012 | 14 ha | under 1 ha | 14 ha |
| 2013 | 2 ha | under 1 ha | 2 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 | 2 ha | under 1 ha | 2 ha |
| 2018 | under 1 ha | under 1 ha | under 1 ha |
| 2019 | 1 ha | under 1 ha | 1 ha |
| 2020 | 3 ha | under 1 ha | 3 ha |
| 2021 | under 1 ha | under 1 ha | under 1 ha |
| 2022 | under 1 ha | under 1 ha | under 1 ha |
| 2023 | 3 ha | under 1 ha | 3 ha |
| 2024 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Porto-Novo?
- Towns and roadscleared for good64% · 36 ha
- Farms, pasture and plantationscleared for good31% · 17 ha
- Storms, floods and other natural causescan grow back1.6% · under 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
- 2,130 ha
- Forest in 2020
- 1,640 ha
- Overall change
- −491 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Porto-Novo shrank from about 2,130 hectares to 1,640 hectares, a net loss of about 491 hectares (−23%). New forest grew on about 154 hectares, but 645 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 Porto-Novo
Same 2 km radius, same index — so they compare directly.
- Irewe60.0 km
Nigeria
- Tree cover
- 75%
- Air quality
- 52
- Ota72.6 km
Nigeria
- Tree cover
- 3%
- Air quality
- 126
- Agege81.7 km
Nigeria
- Tree cover
- 1%
- Air quality
- 127
- Mushin83.0 km
Nigeria
- Tree cover
- 1%
- Air quality
- 125
Also compared:Porto-Novo vs ParakouPorto-Novo vs Abomey
Build your own
Compare Porto-Novo with anywhere
This place
Porto-Novo
Use this data
Put Porto-Novo's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Porto-Novo
What is the air quality (AQI) in Porto-Novo right now?
The latest reading for Porto-Novo shows an AQI of 152 (Unhealthy), observed Nov 10, 21:00 local time via Open-Meteo / CAMS, corrected with 4 ground-station cities within 85 km, US EPA index. The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Porto-Novo today?
At AQI 152 (Unhealthy): everyone should cut down long or hard exercise; sensitive groups should avoid it. Windows: keep them closed. Masks: wear an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Porto-Novo been like this week?
Over the last 7 days, the CAMS air-quality model put Porto-Novo's daily AQI at 63 on average, from 59 on Nov 5 to an hourly peak of 95 on Nov 8. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Porto-Novo lost since 2001?
Since 2001, the area within 10 km of Porto-Novo has lost about 57 hectares of forest (about 79 football pitches): 12% of the forest it had in 2000. Most of it (95%) was deforestation, forest cleared for good, mainly for towns and roads. Comparing satellite maps from 2000 and 2020, the forest around Porto-Novo shrank from about 2,130 hectares to 1,640 hectares, a net loss of about 491 hectares (−23%). New forest grew on about 154 hectares, but 645 hectares were lost.
What is the tree count in Porto-Novo?
Porto-Novo has an estimated 38,642 trees across the 12.57 km² measured — 12.3% tree cover, 28 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Porto-Novo need?
Porto-Novo needs roughly 87,022 more trees to close a 28-point shortfall against its 40% tree-cover target — about 1,914 t of extra CO₂ absorbed per year once grown.
How are Porto-Novo's air quality and tree cover measured?
Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors. 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 Porto-Novo; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address