Coonoor Air Quality Index (AQI) & Air Pollution Today

Tamil Nadu, India — Real-time Air Quality Index (AQI) and PM2.5

Coonoor AQI Right Now

55

Category: Satisfactory

Dominant Pollutant: pm10

PM2.5: 25.12 µg/m³

PM10: 53.62 µg/m³

Last updated: 2026-03-24 — Data source: Google Air Quality API (NAQI). Live NAQI values load when you visit the page.

Coonoor Pollutant Levels

PollutantConcentration
PM2.525.12 µg/m³
PM1053.62 µg/m³
O₃ (Ozone)19.56 µg/m³
NO₂11.19 µg/m³
SO₂1.79 µg/m³
CO430.3 µg/m³

Health Advisory — Coonoor

Satisfactory: Minor breathing discomfort to sensitive people.

Health Impact — Coonoor

Cigarette Equivalent: Breathing this air is equivalent to smoking 1.1 cigarettes per day (based on current PM2.5 levels).

Life Expectancy Impact: Sustained exposure at this PM2.5 level could reduce life expectancy by 0.1 years (AQLI estimate, relative to WHO guideline of 5 µg/m³).

Health Recommendations for Coonoor

  • General Population: Acceptable air quality. Unusually sensitive people should limit prolonged outdoor exertion.
  • Elderly: Minor breathing discomfort is possible.
  • Children: Should be fine outdoors with normal activities.
  • Lung Disease Patients: Consider reducing prolonged outdoor exertion.

Understanding Coonoor Air Quality

Coonoor enjoys exceptional air quality year-round, characteristic of Nilgiri hill stations blessed with elevation, forest cover, and clean mountain air. At 1,850 meters, the town experiences constant cool temperatures and strong atmospheric mixing that prevents pollution accumulation seen in plains areas. The surrounding tea plantations and eucalyptus forests act as natural air filters, producing oxygen and removing particulates. However, like Ooty, Coonoor faces seasonal air quality variation driven entirely by tourism rather than traditional industrial or agricultural pollution sources.

The peak tourist season from March to June brings the year's highest vehicular traffic as visitors arrive to experience the cool climate and tea estate scenery. Tourist vehicles navigating the town's narrow mountain roads create localized emissions, particularly in market areas and near popular viewpoints like Sim's Park and Dolphin's Nose. Tea processing factories contribute a distinctive aromatic smoke during processing seasons, though these emissions are organic and far less harmful than industrial pollutants. The famous Nilgiri Mountain Railway passes through Coonoor, with its steam locomotives adding charming puffs of coal smoke that, while visible, contribute minimally to overall air quality given the excellent natural ventilation.

Winter months from November to February offer Coonoor's cleanest air, with minimal tourism and only local vehicular traffic. Morning mists are natural weather phenomena rather than smog. The monsoon seasons from June to September and October to November maintain excellent air quality through rainfall and vegetation growth. Even during peak tourist season, Coonoor's air remains far cleaner than any plains city, making it a refuge for those seeking respiratory relief from urban pollution.

Primary Pollution Sources

  • Tourist vehicle emissions
  • Tea factory processing emissions
  • Road dust from traffic
  • Eucalyptus pollen and organic matter
  • Hotel and commercial cooking

Geography: Nilgiri hill station at 1,850m elevation with tea plantations, cool climate, excellent air quality, and growing tourism.

Peak pollution months: March, April, May, June

Frequently Asked Questions — Coonoor

How clean is Coonoor's air compared to other Tamil Nadu cities?

Coonoor has among the cleanest air in Tamil Nadu and all of India. At 1,850m elevation with surrounding tea plantations and forests, the town experiences excellent natural air quality year-round. Even during peak tourist season (March-June) when vehicular traffic increases, pollution levels remain far lower than any plains city. Winter months offer virtually pristine air quality with minimal human activity.

Do tea factories affect Coonoor's air quality?

Tea processing facilities produce distinctive aromatic smoke during tea drying and firing processes, but these emissions are organic plant matter rather than industrial chemicals. The impact is localized around factories and far less harmful than industrial pollution. Combined with Coonoor's excellent natural ventilation from mountain winds, tea processing has minimal effect on overall air quality. Many visitors find the tea aroma pleasant rather than problematic.

Air Quality in Nearby Cities