City report · Bihar, India
Patna Air quality today
Air quality in Patna currently reads AQI 189 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
Air quality right now
AQI 189
Unhealthy
- PM2.5, fine particles (µg/m³)
- 109.1
- tree cover
- 19.1%
- trees in this area
- 60.0K
- more trees needed
- 65.7K
Measured across a 2 km radius around Mithapur Farm Area, Mithapur, Patna, Bihar 800001, India (12.57 km²), from a satellite image of Oct 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Patna · AQI 189 (Unhealthy)
Patna's tree count comes to 60,004 trees across 12.57 km², 21 points below the 40% tree-cover level considered healthy for this area, so roughly 65,659 more trees would close the gap.
Air quality detail
Air quality in Patna today: AQI 189, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 21:00 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · IGSC Planetarium Complex, Patna - BSPCB, 200 m away · median of 6 stations
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
109.1
PM10
164.9
NO₂
46.8
O₃
9.0
SO₂
27.8
CO
1.6
Data: OpenAQ · CPCB, Central Pollution Control Board, Government of India (GODL-India)
- Outdoor exercise
- Everyone should cut down long or hard exercise; sensitive groups should avoid it
- Windows
- Keep them closed
- Mask
- Wear an N95 outdoors
- Air purifier
- Run one
Over the last 7 days, the CAMS air-quality model put Patna's daily AQI at 192 on average, from 166 on Nov 9 to an hourly peak of 258 on Nov 8.
This is the US EPA AQI. How it differs from India's AQI (CPCB) · The full guide
Where Patna stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Patna: Critically low
19.1% tree cover against a 40% healthy-neighborhood target, across 12.57 km².
Trees in this area
60,004
Target trees
125,663
More trees needed
65,659
CO₂ if planted / yr
1,444 t
Deforestation · 2001–2025
How much forest has Patna lost?
There was very little forest around Patna in 2000, about 34 hectares, and about 1 hectare 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 February 2017 of a 5 × 5 km area in the city center.
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 | under 1 ha | under 1 ha | under 1 ha |
| 2025 | under 1 ha | under 1 ha | under 1 ha |
Forest gained and lost, 2000–2020
- Forest in 2000
- 433 ha
- Forest in 2020
- 588 ha
- Overall change
- +155 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Patna grew from about 433 hectares to 588 hectares, a net gain of about 155 hectares (+36%). New forest grew on about 165 hectares, while 11 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 Patna
Same 2 km radius, same index — so they compare directly.
- Hājīpur12.6 km
India
- Tree cover
- 38%
- Air quality
- 185
- Chāpra44.1 km
India
- Tree cover
- 28%
- Air quality
- 151
- Jahānābād44.9 km
India
- Tree cover
- 18%
- Air quality
- 160
- Arrah47.6 km
India
- Tree cover
- 32%
- Air quality
- 184
- Bihār Sharīf58.6 km
India
- Tree cover
- 25%
- Air quality
- 208
- Muzaffarpur64.1 km
India
- Tree cover
- 20%
- Air quality
- 167
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Frequently asked
Questions about Patna
What is the air quality (AQI) in Patna right now?
The latest reading for Patna shows an AQI of 189 (Unhealthy), measured Nov 11, 21:00 local time by 6 ground monitoring stations via OpenAQ (the median of their readings; the nearest is IGSC Planetarium Complex, Patna - BSPCB, 200 m away). The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Patna today?
At AQI 189 (Unhealthy): everyone should cut down long or hard exercise; sensitive groups should avoid it. Windows: keep them closed. Masks: wear an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Patna been like this week?
Over the last 7 days, the CAMS air-quality model put Patna's daily AQI at 192 on average, from 166 on Nov 9 to an hourly peak of 258 on Nov 8. On 7 of those days the average was above 100, unhealthy for sensitive groups.
Is Patna'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 Patna lost since 2001?
There was very little forest around Patna in 2000, about 34 hectares, and about 1 hectare 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 Patna grew from about 433 hectares to 588 hectares, a net gain of about 155 hectares (+36%). New forest grew on about 165 hectares, while 11 hectares were lost.
What is the tree count in Patna?
Patna has an estimated 60,004 trees across the 12.57 km² measured — 19.1% tree cover, 21 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Patna need?
Patna needs roughly 65,659 more trees to close a 21-point shortfall against its 40% tree-cover target — about 1,444 t of extra CO₂ absorbed per year once grown.
How are Patna's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Mithapur Farm Area, via OpenAQ; the 7-day trend is the Open-Meteo / CAMS model's estimate. 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 Mithapur Farm Area; the tree count is an estimate derived from that cover.
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