Air quality in Thiruvananthapuram
How bad is the air in Thiruvananthapuram?
Thiruvananthapuram’s 2025 average of AQI 69 is Satisfactory on the CPCB scale, and the median day was 60. 42 days crossed 100 (Moderate or worse) and 8 crossed 200 (Poor or worse).
The peak was AQI 267 on 19 February 2025. Coarse dust (PM10) set the index on 86% of days.
When Thiruvananthapuram’s air is worst
December is the worst month at a mean of AQI 117; June the cleanest at ~41. That is the post-monsoon pattern: cooler nights lower the mixing height, winds drop, and whatever the city emits stays over it.
Plan around the profile, not the average: a purifier sized for December covers the rest of the year with headroom, and windows can be opened in June.
Pollution in Thiruvananthapuram: what drives it
Across Kerala, the usual drivers of poor air are vehicle exhaust, construction dust and with monsoon washout and sea breeze keeping most months clean. CPCB bulletins name coarse dust (PM10) as the prominent pollutant on 86% of 2025's days.
- vehicle exhaust
- construction dust
- with monsoon washout and sea breeze keeping most months clean
How Thiruvananthapuram compares
Among the 62 cities we map, Thiruvananthapuram has the 10th lowest annual AQI, against a median of 94 across those cities.
Elsewhere in Kerala, Thrissur averaged AQI 54.
See the full ranking on the India Air Quality Index by city.
Do you need an air purifier in Thiruvananthapuram?
Verdict
Not essential — Thiruvananthapuram's outdoor air stayed Satisfactory most of the year.
Only 42 of 364 bulletin days went above Satisfactory. Indoor sources (cooking, incense, dust, a busy road outside) can still justify a purifier for a nursery or an allergy household, and sizing still matters — see the calculator.
What actually works
- Size by volume, not the box. Coverage claims assume ~2 air changes an hour; a December night wants 5.
- Bedroom first. Eight closed-door hours a night is where a purifier makes its measurable difference.
- Watch the live number. On Good and Satisfactory days, ventilate; on Poor days, close up and run the unit at the speed that delivers its CADR.
06 · The other half
Water in Thiruvananthapuram
Groundwater near Thiruvananthapuram averages ~225 mg/L TDS on CGWB monitoring — ideal on the BIS scale. The same government-data report, for what you drink.
Air
AQI 69
Satisfactory
Water
225 mg/L
TDS · Ideal
Thiruvananthapuram air — questions
What is the AQI in Thiruvananthapuram today?
Today's figure comes from CPCB's live station feed and is shown at the top of this page, updated hourly when the feed is reachable. For context, Thiruvananthapuram averaged AQI 69 across 2025 and peaked at 267 on 19 February 2025, so a single day's reading should be judged against that range.
How bad is air pollution in Thiruvananthapuram?
Thiruvananthapuram's 2025 average of AQI 69 sits in CPCB's "Satisfactory" band. 8 days were Poor, Very Poor or Severe, and 322 days were Good or Satisfactory, out of 364 bulletin days.
Which month has the worst air quality in Thiruvananthapuram?
December, with a monthly average of AQI 117 in 2025. June was the cleanest at ~41. The post-monsoon build-up, cooler nights and a lower mixing height trap pollution from October onwards.
Is the air in Thiruvananthapuram safe to breathe?
On average, yes: an annual AQI of 69 is within the "Satisfactory" band, where CPCB expects only minor discomfort for sensitive people. Individual days still crossed into Moderate or worse 42 times in 2025, so sensitive groups should watch the daily number.
Do I need an air purifier in Thiruvananthapuram?
Not essential — Thiruvananthapuram's outdoor air stayed Satisfactory most of the year. Only 42 of 364 bulletin days went above Satisfactory. Indoor sources (cooking, incense, dust, a busy road outside) can still justify a purifier for a nursery or an allergy household, and sizing still matters — see the calculator.
Where does Thiruvananthapuram's air pollution come from?
Across Kerala, the usual drivers of poor air are vehicle exhaust, construction dust and with monsoon washout and sea breeze keeping most months clean. CPCB bulletins name coarse dust (PM10) as the prominent pollutant on 86% of 2025's days.
Where does this air quality data come from?
From the Central Pollution Control Board's daily AQI bulletin, published at 4 PM as a 24-hour average for each city with continuous monitoring stations. This page aggregates 364 bulletin days for Thiruvananthapuram in 2025, drawn from 2 stations. The live figure uses the same CPCB station network through the Government of India's open-data feed.
Air quality in other cities
Data sources
- CPCB Daily AQI Bulletin (4 PM, 24-hour average), 2025 — city-level National AQI, prominent pollutant and station counts
- CPCB National Air Quality Index (2014) — six-band scale used for all categories
- NAAQS 2009 (24-hour PM2.5 60 µg/m³, PM10 100 µg/m³) — the concentrations that mark the Satisfactory/Moderate boundary
- Live readings: CPCB real-time station feed via data.gov.in, refreshed hourly.
Primary dataset: Central Pollution Control Board (CPCB) National Air Quality Index, Government of India.
Disclaimer: Figures are city-level averages of the CPCB daily AQI bulletin for the year shown and may differ from the air at your address, which depends on traffic, construction and the nearest station. This page is general information, not medical advice; for respiratory or cardiac conditions consult a qualified professional. Any purifier guidance is general sizing advice, not a product recommendation.