City report · Algeria
Blida Air quality today
Air quality in Blida currently reads AQI 54 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 54
Moderate
- PM2.5, fine particles (µg/m³)
- 11.7
- tree cover
- 27.5%
- trees in this area
- 86.4K
- more trees needed
- 7.9K
Measured across a 2 km radius around Blida, Algeria (12.57 km²), from a satellite image of Sep 15, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Blida · AQI 54 (Moderate)
Blida's tree count comes to 86,394 trees across 12.57 km², 2 points below the 30% tree-cover level considered healthy for this area, so roughly 7,854 more trees would close the gap.
Air quality detail
Air quality in Blida today: AQI 54, Moderate
Main pollutant: PM2.5 · Observed Nov 10, 20:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
11.7
PM10
24.9
NO₂
23.5
O₃
27.0
SO₂
6.2
CO
168.0
- 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 Blida's daily AQI at 38 on average, from 32 on Nov 4 to an hourly peak of 54 on Nov 10.
Where Blida stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Blida: Below target
27.5% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
86,394
Target trees
94,248
More trees needed
7,854
CO₂ if planted / yr
172.8 t
Deforestation · 2001–2025
How much forest has Blida lost?
Since 2001, the area within 10 km of Blida has lost about 1,410 hectares of forest (about 2,000 football pitches): 12% of the forest it had in 2000. Most of it was lost to wildfires, so much of it can grow back. About 190 hectares (13%) was deforestation: forest cleared for good for farms, mines or towns.
2017: satellite photo from September 2017 of a 5 × 5 km area about 3 km southeast of the city center.
- Forest lost since 2001
- 1,410 haabout 2,000 football pitches
- Share of its forest
- 12%of what there was in 2000
- Cleared for good
- 190 hadeforestation: turned into farms, mines or towns
Forest loss is speeding up: about 99 hectares a year in 2021–2025, up from 25 hectares a year in 2016–2020. The worst year was 2025, when about 371 hectares of forest were lost, mostly to wildfires.
Hectares of forest lost each year
Show the figures as a table
| Year | Cleared for good | Can grow back | Total |
|---|---|---|---|
| 2001 | 2 ha | 58 ha | 60 ha |
| 2002 | under 1 ha | under 1 ha | under 1 ha |
| 2003 | 1 ha | 12 ha | 13 ha |
| 2004 | 14 ha | 25 ha | 40 ha |
| 2005 | 6 ha | 8 ha | 14 ha |
| 2006 | 1 ha | 10 ha | 11 ha |
| 2007 | 20 ha | 201 ha | 220 ha |
| 2008 | 14 ha | 175 ha | 189 ha |
| 2009 | 8 ha | 24 ha | 32 ha |
| 2010 | 2 ha | under 1 ha | 2 ha |
| 2011 | 5 ha | 42 ha | 47 ha |
| 2012 | 7 ha | 91 ha | 98 ha |
| 2013 | 4 ha | 5 ha | 9 ha |
| 2014 | 15 ha | 15 ha | 30 ha |
| 2015 | 2 ha | 28 ha | 31 ha |
| 2016 | 5 ha | 33 ha | 37 ha |
| 2017 | 7 ha | 12 ha | 19 ha |
| 2018 | 1 ha | 15 ha | 17 ha |
| 2019 | 13 ha | 9 ha | 22 ha |
| 2020 | 6 ha | 22 ha | 28 ha |
| 2021 | 6 ha | 53 ha | 59 ha |
| 2022 | 16 ha | 25 ha | 41 ha |
| 2023 | 16 ha | 3 ha | 19 ha |
| 2024 | 4 ha | 2 ha | 6 ha |
| 2025 | 14 ha | 357 ha | 371 ha |
What is causing deforestation around Blida?
- Wildfirescan grow back85% · 1,200 ha
- Farms, pasture and plantationscleared for good10% · 147 ha
- Towns and roadscleared for good2.5% · 35 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
- 14,300 ha
- Forest in 2020
- 14,100 ha
- Overall change
- −155 haless forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Blida stayed about the same size, at about 14,100 hectares: new forest grew on about 223 hectares, and about 378 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 Blida
Same 2 km radius, same index — so they compare directly.
- Médéa23.8 km
Algeria
- Tree cover
- 10%
- Air quality
- 44
- Rouiba50.3 km
Algeria
- Tree cover
- 9%
- Air quality
- 57
- Tizi Ouzou112.0 km
Algeria
- Tree cover
- 23%
- Air quality
- 53
- Chlef138.0 km
Algeria
- Tree cover
- 14%
- Air quality
- 43
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Frequently asked
Questions about Blida
What is the air quality (AQI) in Blida right now?
The latest reading for Blida shows an AQI of 54 (Moderate), observed Nov 10, 20:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Unusually sensitive people should consider limiting long outdoor exertion.
Is it safe to exercise outside in Blida today?
At AQI 54 (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 Blida been like this week?
Over the last 7 days, the CAMS air-quality model put Blida's daily AQI at 38 on average, from 32 on Nov 4 to an hourly peak of 54 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Blida lost since 2001?
Since 2001, the area within 10 km of Blida has lost about 1,410 hectares of forest (about 2,000 football pitches): 12% of the forest it had in 2000. Most of it was lost to wildfires, so much of it can grow back. About 190 hectares (13%) was deforestation: forest cleared for good for farms, mines or towns. Forest loss is speeding up: about 99 hectares a year in 2021–2025, up from 25 hectares a year in 2016–2020. Comparing satellite maps from 2000 and 2020, the forest around Blida stayed about the same size, at about 14,100 hectares: new forest grew on about 223 hectares, and about 378 hectares were lost.
What is the tree count in Blida?
Blida has an estimated 86,394 trees across the 12.57 km² measured — 27.5% tree cover, 2 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Blida need?
Blida needs roughly 7,854 more trees to close a 2-point shortfall against its 30% tree-cover target — about 172.8 t of extra CO₂ absorbed per year once grown.
How are Blida'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 Blida; the tree count is an estimate derived from that cover.
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