City report · Cairo, Egypt
Ḩalwān Air quality today
Air quality in Ḩalwān currently reads AQI 102 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
AQI 102
Air quality right now
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 39.2
- tree cover
- 10.6%
- trees in this area
- 29.6K
- more trees needed
- 68.1K
Measured across a 2 km radius around Helwan, Helwan El Balad, Helwan, Cairo Governorate, Egypt (12.57 km²), from a satellite image of Sep 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Ḩalwān · AQI 102 (Unhealthy for sensitive groups)
Ḩalwān's tree count comes to 29,571 trees across 11.16 km² of land, 24 points below the 35% tree-cover level considered healthy for this area, so roughly 68,070 more trees would close the gap.
Air quality detail
Air quality in Ḩalwān today: AQI 102, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 01:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 65 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 65 km, e.g. New Cairo 1 and Obour
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
39.2
PM10
16.6
NO₂
34.7
O₃
35.0
SO₂
20.5
CO
180.0
- 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 Ḩalwān's daily AQI at 59 on average, from 53 on Nov 6 to an hourly peak of 90 on Nov 9.
Where Ḩalwān stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Ḩalwān: Critically low
10.6% tree cover against a 35% healthy-neighborhood target, across 11.16 km² of land.
Trees in this area
29,571
Target trees
97,641
More trees needed
68,070
CO₂ if planted / yr
1,498 t
Deforestation · 2001–2025
How much forest has Ḩalwān lost?
There was very little forest around Ḩalwān in 2000, about 40 hectares, and about 6 hectares of it has been lost since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
The worst year was 2012, when about 5 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 | under 1 ha | under 1 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | under 1 ha | under 1 ha | under 1 ha |
| 2004 | under 1 ha | under 1 ha | under 1 ha |
| 2005 | under 1 ha | under 1 ha | under 1 ha |
| 2006 | under 1 ha | under 1 ha | under 1 ha |
| 2007 | under 1 ha | under 1 ha | under 1 ha |
| 2008 | under 1 ha | under 1 ha | under 1 ha |
| 2009 | under 1 ha | under 1 ha | under 1 ha |
| 2010 | under 1 ha | under 1 ha | under 1 ha |
| 2011 | under 1 ha | under 1 ha | under 1 ha |
| 2012 | 3 ha | 3 ha | 5 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 | under 1 ha | under 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 | under 1 ha | under 1 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 Ḩalwān?
- Towns and roadscleared for good52% · 3 ha
- Unknown causescause unknown47% · 3 ha
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
- 328 ha
- Forest in 2020
- 335 ha
- Overall change
- +7 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Ḩalwān stayed about the same size, at about 335 hectares: new forest grew on about 11 hectares, and about 3 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 Ḩalwān
What is the air quality (AQI) in Ḩalwān right now?
The latest reading for Ḩalwān shows an AQI of 102 (Unhealthy for sensitive groups), observed Nov 11, 01:00 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 65 km, US EPA index. The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Ḩalwān today?
At AQI 102 (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 Ḩalwān been like this week?
Over the last 7 days, the CAMS air-quality model put Ḩalwān's daily AQI at 59 on average, from 53 on Nov 6 to an hourly peak of 90 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 Ḩalwān lost since 2001?
There was very little forest around Ḩalwān in 2000, about 40 hectares, and about 6 hectares of it has been lost since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here. Comparing satellite maps from 2000 and 2020, the forest around Ḩalwān stayed about the same size, at about 335 hectares: new forest grew on about 11 hectares, and about 3 hectares were lost.
What is the tree count in Ḩalwān?
Ḩalwān has an estimated 29,571 trees across the 11.16 km² of land measured — 10.6% tree cover, 24 percentage points short of the 35% tree-cover target set for this area.
How many more trees does Ḩalwān need?
Ḩalwān needs roughly 68,070 more trees to close a 24-point shortfall against its 35% tree-cover target — about 1,498 t of extra CO₂ absorbed per year once grown.
How are Ḩalwān'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 Helwan; the tree count is an estimate derived from that cover.
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