Thiruvallur Air Quality Index (AQI) & Air Pollution Today

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

Thiruvallur AQI Right Now

66

Category: Satisfactory

Dominant Pollutant: pm10

PM2.5: 36.51 µg/m³

PM10: 65.48 µg/m³

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

Thiruvallur Pollutant Levels

PollutantConcentration
PM2.536.51 µg/m³
PM1065.48 µg/m³
O₃ (Ozone)14.47 µg/m³
NO₂11.09 µg/m³
SO₂3.51 µg/m³
CO468.06 µg/m³

Health Advisory — Thiruvallur

Satisfactory: Minor breathing discomfort to sensitive people.

Health Impact — Thiruvallur

Cigarette Equivalent: Breathing this air is equivalent to smoking 1.7 cigarettes per day (based on current PM2.5 levels).

Life Expectancy Impact: Sustained exposure at this PM2.5 level could reduce life expectancy by 0.17 years (AQLI estimate, relative to WHO guideline of 5 µg/m³).

Health Recommendations for Thiruvallur

  • 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 Thiruvallur Air Quality

Thiruvallur experiences moderate air pollution typical of Tier-2 Tamil Nadu towns, with peak degradation during winter months (November-February) when atmospheric stability limits dispersion. Vehicle emissions from district administrative traffic and commercial vehicles on connecting roads create localized hotspots, particularly around the bus stand and main bazaar areas. Unlike the industrial pollution of nearby Chennai suburbs, Thiruvallur's air quality issues stem primarily from vehicular traffic, construction dust, and seasonal agricultural burning.

The surrounding agricultural landscape means crop residue burning during harvest periods adds episodic spikes of PM2.5 and PM10. Brick kilns operating on the town's periphery emit significant particulates and SO₂, particularly during the dry construction season (January-June). These traditional coal-fired or biomass-fueled kilns lack emission controls and contribute to regional background pollution that affects Thiruvallur and neighboring villages.

Summer months (March-June) see moderate air quality with dust from unpaved roads becoming a major contributor. Monsoon rains bring relief by suppressing dust and washing out airborne particles. Overall, Thiruvallur's air quality is better than metropolitan Chennai but still requires monitoring, especially for vulnerable populations during winter peak pollution periods.

Primary Pollution Sources

  • Vehicle emissions from district traffic
  • Construction dust
  • Agricultural burning in surrounding areas
  • Brick kiln emissions
  • Road dust

Geography: District headquarters town north of Chennai, administrative center with agriculture in surrounding areas and growing urban development

Peak pollution months: November, December, January, February

Frequently Asked Questions — Thiruvallur

How does Thiruvallur's air quality compare to Chennai?

Thiruvallur generally has better air quality than Chennai due to lower traffic density and absence of major industrial sources. However, winter months and harvest season agricultural burning can create concerning pollution episodes that require attention.

What are the main pollution sources in Thiruvallur?

Vehicle emissions from district traffic, construction dust from urban development, seasonal agricultural burning, and brick kiln emissions from peripheral industrial areas are the primary air quality concerns in Thiruvallur.

Air Quality in Nearby Cities