City report · Tamil Nadu, India
Tiruvannamalai Air quality today
Air quality in Tiruvannamalai currently reads AQI 133 (Unhealthy for sensitive groups): Sensitive groups should limit long or intense outdoor activity.
AQI 133
Air quality right now
Unhealthy for sensitive groups
- PM2.5, fine particles (µg/m³)
- 48.8
- tree cover
- 38.4%
- trees in this area
- 120K
- more trees needed
- 0
Measured across a 2 km radius around Tiruvennanallur, Tiruvannamalai, Tamil Nadu 606601, India (12.57 km²), from a satellite image of Oct 29, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.
Tiruvannamalai · AQI 133 (Unhealthy for sensitive groups)
Tiruvannamalai's tree count comes to 120,275 trees across 12.53 km² of land, already at or above the 35% tree-cover level considered healthy for this area.
Air quality detail
Air quality in Tiruvannamalai today: AQI 133, Unhealthy for sensitive groups
Main pollutant: PM2.5 · Observed Nov 11, 03:30 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. Values in µg/m³.
Estimate · model corrected with 2 station cities within 145 km, e.g. Chittoor and Pallavaram (Contonment)
Health signal
Sensitive groups should limit long or intense outdoor activity.
PM2.5
48.8
PM10
51.3
NO₂
9.3
O₃
80.0
SO₂
13.2
CO
404.0
- Outdoor exercise
- Children, older adults and people with asthma or heart disease should cut down long or hard exercise
- Windows
- Close them to keep the outside air out
- Mask
- Sensitive groups: an N95 outdoors
- Air purifier
- Run one, especially in bedrooms
Over the last 7 days, the CAMS air-quality model put Tiruvannamalai's daily AQI at 90 on average, from 57 on Nov 6 to an hourly peak of 138 on Nov 9.
This is the US EPA AQI. How it differs from India's AQI (CPCB) · The full guide
Where Tiruvannamalai stands: the most polluted cities in the world right now · the cleanest
Tree cover detail
Tree cover in Tiruvannamalai: Healthy tree cover
38.4% tree cover against a 35% healthy-neighborhood target, across 12.53 km² of land.
Trees in this area
120,275
Target trees
120,275
More trees needed
0
CO₂ if planted / yr
0 kg
Deforestation · 2001–2025
How much forest has Tiruvannamalai lost?
There was very little forest around Tiruvannamalai in 2000, about 47 hectares, and about 6 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 February 2017 of a 5 × 5 km area in the city center.
The worst year was 2001, 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 | 2 ha |
| 2002 | under 1 ha | under 1 ha | 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 |
What is causing deforestation around Tiruvannamalai?
- Farms, pasture and plantationscleared for good34% · 2 ha
- Unknown causescause unknown62% · 4 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
- 2,460 ha
- Forest in 2020
- 2,780 ha
- Overall change
- +317 hamore forest than in 2000
Comparing satellite maps from 2000 and 2020, the forest around Tiruvannamalai grew from about 2,460 hectares to 2,780 hectares, a net gain of about 317 hectares (+13%). New forest grew on about 320 hectares, while 3 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 Tiruvannamalai
Same 2 km radius, same index — so they compare directly.
- Kallakurichi56.2 km
India
- Tree cover
- 39%
- Air quality
- 158
- Ambur73.9 km
India
- Tree cover
- 44%
- Air quality
- 153
- Vellore77.2 km
India
- Tree cover
- 32%
- Air quality
- 112
- Rānipet82.5 km
India
- Tree cover
- 39%
- Air quality
- 138
- Neyveli82.8 km
India
- Tree cover
- 70%
- Air quality
- 144
- Puducherry88.3 km
India
- Tree cover
- 25%
- Air quality
- 165
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Frequently asked
Questions about Tiruvannamalai
What is the air quality (AQI) in Tiruvannamalai right now?
The latest reading for Tiruvannamalai shows an AQI of 133 (Unhealthy for sensitive groups), observed Nov 11, 03:30 local time via Open-Meteo / CAMS, corrected with 2 ground-station cities within 145 km, US EPA index. The main pollutant is PM2.5. Sensitive groups should limit long or intense outdoor activity.
Is it safe to exercise outside in Tiruvannamalai today?
At AQI 133 (Unhealthy for sensitive groups): children, older adults and people with asthma or heart disease should cut down long or hard exercise. Windows: close them to keep the outside air out. Masks: sensitive groups: an N95 outdoors. The reading changes through the day, so check again before a long run or ride.
What has the air quality in Tiruvannamalai been like this week?
Over the last 7 days, the CAMS air-quality model put Tiruvannamalai's daily AQI at 90 on average, from 57 on Nov 6 to an hourly peak of 138 on Nov 9. On 3 of those days the average was above 100, unhealthy for sensitive groups.
Is Tiruvannamalai'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 Tiruvannamalai lost since 2001?
There was very little forest around Tiruvannamalai in 2000, about 47 hectares, and about 6 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 Tiruvannamalai grew from about 2,460 hectares to 2,780 hectares, a net gain of about 317 hectares (+13%). New forest grew on about 320 hectares, while 3 hectares were lost.
What is the tree count in Tiruvannamalai?
Tiruvannamalai has an estimated 120,275 trees across the 12.53 km² of land measured — 38.4% tree cover, already past the 35% tree-cover target set for this area.
How many more trees does Tiruvannamalai need?
Tiruvannamalai has already reached its tree-cover target, so no additional trees are needed to close the gap.
How are Tiruvannamalai'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 Tiruvennanallur; the tree count is an estimate derived from that cover.
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