City report · Bihar, India
Arrah Air quality today
Air quality in Arrah currently reads AQI 191 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.
AQI 191
Air quality right now
Unhealthy
- PM2.5, fine particles (µg/m³)
- 113.0
- tree cover
- 31.5%
- trees in this area
- 98.5K
- more trees needed
- 26.6K
Measured across a 2 km radius around Professor Colony, Nawada, Arrah, Bihar 802301, India (12.57 km²), from a satellite image of Oct 26, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Arrah · AQI 191 (Unhealthy)
Arrah's tree count comes to 98,465 trees across 12.51 km² of land, 9 points below the 40% tree-cover level considered healthy for this area, so roughly 26,570 more trees would close the gap.
Air quality detail
Air quality in Arrah today: AQI 191, Unhealthy
Main pollutant: PM2.5 · Observed Nov 11, 21:30 local time via OpenAQ ground stations, US EPA index. Values in µg/m³.
Ground station · New DM Office, Arrah - BSPCB, 700 m away
Health signal
Everyone should limit long outdoor exertion; sensitive groups more so.
PM2.5
113.0
PM10
165.0
NO₂
9.4
O₃
7.7
SO₂
11.0
CO
1.1
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 Arrah's daily AQI at 200 on average, from 181 on Nov 9 to an hourly peak of 266 on Nov 8.
This is the US EPA AQI. How it differs from India's AQI (CPCB) · The full guide
Where Arrah stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Arrah: Below target
31.5% tree cover against a 40% healthy-neighborhood target, across 12.51 km² of land.
Trees in this area
98,465
Target trees
125,035
More trees needed
26,570
CO₂ if planted / yr
584.5 t
Deforestation · 2001–2025
How much forest has Arrah lost?
Since 2001, the area within 10 km of Arrah has lost about 2 hectares of forest: 1.1% of the forest it had in 2000. The satellites couldn't tell what caused most of it. Almost none of it was deforestation, meaning forest cleared for good.
2017: satellite photo from March 2017 of a 5 × 5 km area in the city center.
- Forest lost since 2001
- 2 ha
- Share of its forest
- 1.1%of what there was in 2000
- Cleared for good
- under 1 hadeforestation: turned into farms, mines or towns
The worst year was 2009, when about 1 hectare 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 | 1 ha | 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
- 641 ha
- Forest in 2020
- 825 ha
- Overall change
- +184 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Arrah grew from about 641 hectares to 825 hectares, a net gain of about 184 hectares (+29%). New forest grew on about 190 hectares, while 6 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 Arrah
Same 2 km radius, same index — so they compare directly.
Build your own
Compare Arrah with anywhere
This place
Arrah
Use this data
Put Arrah's numbers on your site
Free to embed. Updates itself as the measurement refreshes.
Frequently asked
Questions about Arrah
What is the air quality (AQI) in Arrah right now?
The latest reading for Arrah shows an AQI of 191 (Unhealthy), measured Nov 11, 21:30 local time by the New DM Office, Arrah - BSPCB ground monitoring station, 700 m away, via OpenAQ. The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.
Is it safe to exercise outside in Arrah today?
At AQI 191 (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 Arrah been like this week?
Over the last 7 days, the CAMS air-quality model put Arrah's daily AQI at 200 on average, from 181 on Nov 9 to an hourly peak of 266 on Nov 8. On 7 of those days the average was above 100, unhealthy for sensitive groups.
Is Arrah'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 Arrah lost since 2001?
Since 2001, the area within 10 km of Arrah has lost about 2 hectares of forest: 1.1% of the forest it had in 2000. The satellites couldn't tell what caused most of it. Almost none of it was deforestation, meaning forest cleared for good. Comparing satellite maps from 2000 and 2020, the forest around Arrah grew from about 641 hectares to 825 hectares, a net gain of about 184 hectares (+29%). New forest grew on about 190 hectares, while 6 hectares were lost.
What is the tree count in Arrah?
Arrah has an estimated 98,465 trees across the 12.51 km² of land measured — 31.5% tree cover, 9 percentage points short of the 40% tree-cover target set for this area.
How many more trees does Arrah need?
Arrah needs roughly 26,570 more trees to close a 9-point shortfall against its 40% tree-cover target — about 584.5 t of extra CO₂ absorbed per year once grown.
How are Arrah's air quality and tree cover measured?
Air quality is measured by ground monitoring stations near Professor Colony, 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 Professor Colony; the tree count is an estimate derived from that cover.
See your own area
What does your neighborhood look like?
Pick any point and radius to get the same air-quality and tree-cover breakdown.
Check my address