City report · Karnataka, India
Hassan Air quality today
Air quality in Hassan currently reads AQI 75 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Air quality right now
AQI 75
Moderate
- PM2.5, fine particles (µg/m³)
- 25.7
- tree cover
- 22.4%
- trees in this area
- 69.1K
- more trees needed
- 23.4K
Measured across a 2 km radius around Penshan Mohalla, Hassan, Karnataka, India (12.57 km²), from a satellite image of Oct 29, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Hassan · AQI 75 (Moderate)
Hassan's tree count comes to 69,105 trees across 12.34 km² of land, 8 points below the 30% tree-cover level considered healthy for this area, so roughly 23,446 more trees would close the gap.
Air quality detail
Air quality in Hassan today: AQI 75, Moderate
Main pollutant: PM2.5 · Observed Nov 11, 06:30 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 125 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 125 km, e.g. Bhadravathi and Shivamogga
Health signal
Unusually sensitive people should consider limiting long outdoor exertion.
PM2.5
25.7
PM10
35.9
NO₂
8.5
O₃
84.0
SO₂
10.8
CO
375.0
- 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 Hassan's daily AQI at 66 on average, from 42 on Nov 6 to an hourly peak of 116 on Nov 10.
This is the US EPA AQI. How it differs from India's AQI (CPCB) · The full guide
Where Hassan stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Hassan: Below target
22.4% tree cover against a 30% healthy-neighborhood target, across 12.34 km² of land.
Trees in this area
69,105
Target trees
92,551
More trees needed
23,446
CO₂ if planted / yr
515.8 t
Deforestation · 2001–2025
How much forest has Hassan lost?
There was very little forest around Hassan in 2000, about 38 hectares, and about 4 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 January 2017 of a 5 × 5 km area in the city center.
The worst year was 2024, when about 2 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 | under 1 ha | under 1 ha | under 1 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 | 2 ha | under 1 ha | 2 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
What is causing deforestation around Hassan?
- Farms, pasture and plantationscleared for good85% · 3 ha
- Unknown causescause unknown13% · under 1 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
- 3,780 ha
- Forest in 2020
- 4,650 ha
- Overall change
- +875 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Hassan grew from about 3,780 hectares to 4,650 hectares, a net gain of about 875 hectares (+23%). New forest grew on about 886 hectares, while 12 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 Hassan
Same 2 km radius, same index — so they compare directly.
- Chikmagalūr49.5 km
India
- Tree cover
- 27%
- Air quality
- 72
- Mysuru98.4 km
India
- Tree cover
- 37%
- Air quality
- 174
- Mandya102.3 km
India
- Tree cover
- 36%
- Air quality
- 182
- Bhadrāvati102.7 km
India
- Tree cover
- 54%
- Air quality
- 73
- Tumkūr115.1 km
India
- Tree cover
- 28%
- Air quality
- 181
- Shivamogga117.6 km
India
- Tree cover
- 26%
- Air quality
- 73
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Frequently asked
Questions about Hassan
What is the air quality (AQI) in Hassan right now?
The latest reading for Hassan shows an AQI of 75 (Moderate), observed Nov 11, 06:30 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 125 km, 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 Hassan today?
At AQI 75 (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 Hassan been like this week?
Over the last 7 days, the CAMS air-quality model put Hassan's daily AQI at 66 on average, from 42 on Nov 6 to an hourly peak of 116 on Nov 10. No day averaged above 100, the level where the air turns unhealthy for sensitive groups.
Is Hassan's AQI the same as India's AQI (CPCB)?
No. Airleaf shows the US EPA Air Quality Index (AQI), the scale used by IQAir and most air-quality apps. India's Central Pollution Control Board (CPCB) publishes the National Air Quality Index on its own scale: 0–50 good, 51–100 satisfactory, 101–200 moderate, 201–300 poor, 301–400 very poor and 401–500 severe. The two scales don't line up. At moderate fine-particle levels the US scale reads higher: 55 µg/m³ of PM2.5 is 149 on the US AQI but about 92, "satisfactory", on India's. In heavy smog India's reads higher: 100 µg/m³ is 182 on the US AQI and about 232, "poor", on India's. CPCB also averages particles over 24 hours, so its figure moves more slowly than an hourly reading.
How much forest has the area around Hassan lost since 2001?
There was very little forest around Hassan in 2000, about 38 hectares, and about 4 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 Hassan grew from about 3,780 hectares to 4,650 hectares, a net gain of about 875 hectares (+23%). New forest grew on about 886 hectares, while 12 hectares were lost.
What is the tree count in Hassan?
Hassan has an estimated 69,105 trees across the 12.34 km² of land measured — 22.4% tree cover, 8 percentage points short of the 30% tree-cover target set for this area.
How many more trees does Hassan need?
Hassan needs roughly 23,446 more trees to close a 8-point shortfall against its 30% tree-cover target — about 515.8 t of extra CO₂ absorbed per year once grown.
How are Hassan'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 Penshan Mohalla; the tree count is an estimate derived from that cover.
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