City report · Iran
Zanjan Air quality today
Air quality in Zanjan currently reads AQI 37 (Good): Air quality is satisfactory for everyone.
AQI 37
Air quality right now
Good
- PM2.5, fine particles (µg/m³)
- 5.6
- tree cover
- 3.9%
- trees in this area
- 12.3K
- more trees needed
- 82.0K
Measured across a 2 km radius around Zanjan, Zanjan Province, Iran (12.57 km²), from a satellite image of Sep 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Zanjan · AQI 37 (Good)
Zanjan's tree count comes to 12,252 trees across 12.57 km², 26 points below the 30% tree-cover level considered healthy for this area, so roughly 81,996 more trees would close the gap.
Air quality detail
Air quality in Zanjan today: AQI 37, Good
Main pollutant: PM2.5 · Observed Nov 11, 14:30 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
5.6
PM10
7.9
NO₂
6.2
O₃
87.0
SO₂
4.6
CO
204.0
- 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 Zanjan's daily AQI at 38 on average, from 20 on Nov 9 to an hourly peak of 66 on Nov 10.
Where Zanjan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Zanjan: Critically low
3.9% tree cover against a 30% healthy-neighborhood target, across 12.57 km².
Trees in this area
12,252
Target trees
94,248
More trees needed
81,996
CO₂ if planted / yr
1,804 t
Deforestation · 2001–2025
How much forest has Zanjan lost?
There was almost no forest around Zanjan 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 August 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
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Frequently asked
Questions about Zanjan
What is the air quality (AQI) in Zanjan right now?
The latest reading for Zanjan shows an AQI of 37 (Good), observed Nov 11, 14:30 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 Zanjan today?
At AQI 37 (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 Zanjan been like this week?
Over the last 7 days, the CAMS air-quality model put Zanjan's daily AQI at 38 on average, from 20 on Nov 9 to an hourly peak of 66 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 Zanjan lost since 2001?
There was almost no forest around Zanjan 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 Zanjan?
Zanjan has an estimated 12,252 trees across the 12.57 km² measured — 3.9% tree cover, 26 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Zanjan need?
Zanjan needs roughly 81,996 more trees to close a 26-point shortfall against its 30% tree-cover target — about 1,804 t of extra CO₂ absorbed per year once grown.
How are Zanjan'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 Zanjan; the tree count is an estimate derived from that cover.
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