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City report · Tamil Nadu, India

Ambur Air quality today

Air quality in Ambur currently reads AQI 153 (Unhealthy): Everyone should limit long outdoor exertion; sensitive groups more so.

Air quality right now

AQI 153

Unhealthy

Main pollutant: PM2.5
PM2.5, fine particles (µg/m³)
61.7
tree cover
44.4%
trees in this area
139K
more trees needed
0

Measured across a 2 km radius around Noorullahpet, Vaatimanai, Ambur, Tamil Nadu 635802, India (12.57 km²), from a satellite image of Oct 29, 2026. Lower AQI is better: 0–50 is Good, above 300 is Hazardous.

Ambur · AQI 153 (Unhealthy)

Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Oct 29, 2026

Ambur's tree count comes to 139,487 trees across 12.57 km², already at or above the 40% tree-cover level considered healthy for this area.

Air quality detail

Air quality in Ambur today: AQI 153, Unhealthy

Main pollutant: PM2.5 · Observed Nov 11, 03:30 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 125 km, US EPA index. Values in µg/m³.

Estimate · model corrected with 3 station cities within 125 km, e.g. Chittoor and Tirupati

Health signal

Everyone should limit long outdoor exertion; sensitive groups more so.

PM2.5

61.7

PM10

53.9

NO₂

12.9

O₃

73.0

SO₂

10.8

CO

472.0

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 Ambur's daily AQI at 84 on average, from 44 on Nov 6 to an hourly peak of 137 on Nov 10.

Last 7 daysavg 84 · peak 137
Nov 5: AQI 62 (peak 91)Nov 6: AQI 44 (peak 62)Nov 7: AQI 54 (peak 64)Nov 8: AQI 68 (peak 97)Nov 9: AQI 116 (peak 131)Nov 10: AQI 125 (peak 137)Nov 11: AQI 121 (peak 125)
Nov 5Nov 11

This is the US EPA AQI. How it differs from India's AQI (CPCB) · The full guide

Where Ambur stands: the most polluted cities in the world right now · the cleanest

Tree cover detail

Tree cover in Ambur: Healthy tree cover

44.4% tree cover against a 40% healthy-neighborhood target, across 12.57 km².

Target reached

Trees in this area

139,487

Target trees

139,487

More trees needed

0

CO₂ if planted / yr

0 kg

Deforestation · 2001–2025

How much forest has Ambur lost?

Since 2001, the area within 10 km of Ambur has lost about 7 hectares of forest (about 10 football pitches): under 1% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (19%). About 2 hectares (22%) was deforestation: forest cleared for good for farms, mines or towns.

Satellite image of the area around Ambur, February 2017

2017: satellite photo from February 2017 of a 5 × 5 km area in the city center.

Forest lost since 2001
7 haabout 10 football pitches
Share of its forest
under 1%of what there was in 2000
Cleared for good
2 hadeforestation: turned into farms, mines or towns

The worst year was 2004, when about 3 hectares of forest were lost.

Forest lost each year around Ambur, 2001–2025

Hectares of forest lost each year

Forest lost each year around Ambur, 2001–2025. Use the left and right arrow keys to read each year.2.6

Show the figures as a table
Forest lost each year around Ambur, 2001–2025
YearCleared for goodCan grow backTotal
2001under 1 haunder 1 haunder 1 ha
2002under 1 haunder 1 haunder 1 ha
2003under 1 haunder 1 haunder 1 ha
2004under 1 ha2 ha3 ha
2005under 1 haunder 1 haunder 1 ha
2006under 1 haunder 1 haunder 1 ha
2007under 1 haunder 1 haunder 1 ha
2008under 1 haunder 1 haunder 1 ha
2009under 1 haunder 1 haunder 1 ha
2010under 1 haunder 1 haunder 1 ha
2011under 1 haunder 1 haunder 1 ha
2012under 1 haunder 1 haunder 1 ha
2013under 1 haunder 1 haunder 1 ha
2014under 1 haunder 1 haunder 1 ha
2015under 1 haunder 1 haunder 1 ha
2016under 1 haunder 1 haunder 1 ha
2017under 1 haunder 1 haunder 1 ha
2018under 1 haunder 1 haunder 1 ha
2019under 1 haunder 1 haunder 1 ha
2020under 1 haunder 1 haunder 1 ha
2021under 1 haunder 1 haunder 1 ha
2022under 1 haunder 1 haunder 1 ha
2023under 1 haunder 1 haunder 1 ha
2024under 1 haunder 1 haunder 1 ha
2025under 1 ha1 ha1 ha

What is causing deforestation around Ambur?

  • Farms, pasture and plantationscleared for good19% · 1 ha
  • Wildfirescan grow back11% · under 1 ha
  • Towns and roadscleared for good1.4% · under 1 ha

Also: unknown causes.

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
17,600 ha
Forest in 2020
18,300 ha
Overall change
+629 hamore forest than in 2000

Comparing satellite maps from 2000 and 2020, the forest around Ambur grew from about 17,600 hectares to 18,300 hectares, a net gain of about 629 hectares (+3.6%). New forest grew on about 646 hectares, while 18 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 Ambur

Same 2 km radius, same index — so they compare directly.

  • Vellore

    India

    47.3 km
    Tree cover
    32%
    Air quality
    133
  • Robertsonpet

    India

    51.2 km
    Tree cover
    34%
    Air quality
    186
  • Chittoor

    India

    62.1 km
    Tree cover
    41%
    Air quality
    114
  • Rānipet

    India

    68.5 km
    Tree cover
    39%
    Air quality
    154
  • Tiruvannamalai

    India

    73.9 km
    Tree cover
    38%
    Air quality
    159
  • Kolār

    India

    74.3 km
    Tree cover
    18%
    Air quality
    181

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Ambur air quality (AQI) and tree cover — measured by Airleaf
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Frequently asked

Questions about Ambur

What is the air quality (AQI) in Ambur right now?

The latest reading for Ambur shows an AQI of 153 (Unhealthy), observed Nov 11, 03:30 local time via Open-Meteo / CAMS, corrected with 3 ground-station cities within 125 km, US EPA index. The main pollutant is PM2.5. Everyone should limit long outdoor exertion; sensitive groups more so.

Is it safe to exercise outside in Ambur today?

At AQI 153 (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 Ambur been like this week?

Over the last 7 days, the CAMS air-quality model put Ambur's daily AQI at 84 on average, from 44 on Nov 6 to an hourly peak of 137 on Nov 10. On 3 of those days the average was above 100, unhealthy for sensitive groups.

Is Ambur'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 Ambur lost since 2001?

Since 2001, the area within 10 km of Ambur has lost about 7 hectares of forest (about 10 football pitches): under 1% of the forest it had in 2000. The biggest cause was farms, pasture and plantations (19%). About 2 hectares (22%) was deforestation: forest cleared for good for farms, mines or towns. Comparing satellite maps from 2000 and 2020, the forest around Ambur grew from about 17,600 hectares to 18,300 hectares, a net gain of about 629 hectares (+3.6%). New forest grew on about 646 hectares, while 18 hectares were lost.

What is the tree count in Ambur?

Ambur has an estimated 139,487 trees across the 12.57 km² measured — 44.4% tree cover, already past the 40% tree-cover target set for this area.

How many more trees does Ambur need?

Ambur has already reached its tree-cover target, so no additional trees are needed to close the gap.

How are Ambur'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 Noorullahpet; the tree count is an estimate derived from that cover.

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