City report · Eritrea
Keren Air quality today
Air quality in Keren currently reads AQI 19 (Good): Air quality is satisfactory for everyone.
Air quality right now
AQI 19
Good
- PM2.5, fine particles (µg/m³)
- 3.1
- tree cover
- 3.7%
- trees in this area
- 11.6K
- more trees needed
- 82.6K
Measured across a 2 km radius around Keren, Eritrea (12.57 km²), from a satellite image of Sep 14, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Keren · AQI 19 (Good)
Keren's tree count comes to 11,624 trees across 12.57 km², 26 points below the 30% tree-cover level considered healthy for this area, so roughly 82,624 more trees would close the gap.
Air quality detail
Air quality in Keren today: AQI 19, Good
Main pollutant: PM2.5 · Observed Nov 11, 10:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.
Model estimate · no ground station nearby
Health signal
Air quality is satisfactory for everyone.
PM2.5
3.1
PM10
4.7
NO₂
0.1
O₃
72.0
SO₂
1.0
CO
149.0
- Outdoor exercise
- A good day to be active outside
- Windows
- Open them to air the house
- Mask
- Not needed
- Air purifier
- Not needed
Over the last 7 days, the CAMS air-quality model put Keren's daily AQI at 40 on average, from 22 on Nov 11 to an hourly peak of 60 on Nov 5.
Where Keren stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Keren: Critically low
3.7% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
11,624
Target trees
94,248
More trees needed
82,624
CO₂ if planted / yr
1,818 t
Deforestation · 2001–2025
How much forest has Keren lost?
There was almost no forest around Keren in 2000, so there has been almost nothing to lose 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 June 2017 of a 5 × 5 km area in the city center.
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. Images: contains modified Copernicus Sentinel data. How it's measured
In the same region
Measured cities near Keren
Same 2 km radius, same index — so they compare directly.
- Massawa111.2 km
Eritrea
- Tree cover
- 2%
- Air quality
- 58
- Inda Silasē187.1 km
Ethiopia
- Tree cover
- 19%
- Air quality
- 28
- Ādīgrat199.1 km
Ethiopia
- Tree cover
- 12%
- Air quality
- 51
- Kassala222.6 km
Sudan
- Tree cover
- 14%
- Air quality
- 59
Also compared:Keren vs Himora
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Frequently asked
Questions about Keren
What is the air quality (AQI) in Keren right now?
The latest reading for Keren shows an AQI of 19 (Good), observed Nov 11, 10:00 local time via Open-Meteo / CAMS, US EPA index. The main pollutant is PM2.5. Air quality is satisfactory for everyone.
Is it safe to exercise outside in Keren today?
At AQI 19 (Good): a good day to be active outside. Windows: open them to air the house. Masks: not needed. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Keren been like this week?
Over the last 7 days, the CAMS air-quality model put Keren's daily AQI at 40 on average, from 22 on Nov 11 to an hourly peak of 60 on Nov 5. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
How much forest has the area around Keren lost since 2001?
There was almost no forest around Keren in 2000, so there has been almost nothing to lose since. Only fairly dense woodland counts as forest in these maps, so scattered street and garden trees don't show up here.
What is the tree count in Keren?
Keren has an estimated 11,624 trees across the 12.57 km² measured — 3.7% tree cover, 26 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Keren need?
Keren needs roughly 82,624 more trees to close a 26-point shortfall against its 30% tree-cover target — about 1,818 t of extra CO₂ absorbed per year once grown.
How are Keren'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 Keren; the tree count is an estimate derived from that cover.
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