Air quality
Air quality in Tiruchirappalli today
Updated
Good (US AQI 31) Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. Model estimate for Sun, Oct 25, 11:30 pm (18:00 UTC).
Live AQI, PM2.5, PM10 and ozone for Tiruchirappalli, Tamil Nadu, India, with a 48-hour forecast and the best time to be outside.
- US AQI now
- 31 Good
- PM2.5
- 7.5 µg/m³ 0.5× WHO 24-h guideline
- PM10
- 7.7 µg/m³
- Ozone
- 36 µg/m³
- Dominant pollutant
- PM2.5 sub-index 31
- Best hour today
- 6:30 am AQI 37
- European AQI
- 25
Air quality in Tiruchirappalli right now
Right now the modelled US Air Quality Index for Tiruchirappalli, Tamil Nadu, India is 31, which falls in the "Good" band (up to 50). Air quality is satisfactory and poses little or no risk; a good time for outdoor activity.
The index is driven mainly by PM2.5, whose own sub-index is 31. Fine and coarse particles come from traffic, heating, industry, dust and smoke; they build up on calm nights and clear when wind or rain arrives.
PM2.5 is 7.5 µg/m³, within the WHO 24-hour guideline of 15 µg/m³; PM10 is 7.7 µg/m³ against a guideline of 45; ozone is 36 µg/m³ (below the WHO 8-hour level of 100); nitrogen dioxide is 13 µg/m³ (below the 24-hour guideline of 25).
Also this hour: carbon monoxide 283 µg/m³.
Tiruchirappalli AQI forecast: next 48 hours
Over the next 24 hours the AQI is forecast to range from 31 around Sun 11:30 pm to 85 around Mon 11:30 pm, from "Good" at best to "Moderate" at worst.
The following day is expected to be worse, averaging about 106 against 52 for the next 24 hours.
| Local time (Asia/Kolkata) | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Sun 11:30 pm | 31 | Good | 7.5 | 8 | 36 |
| Mon 2:30 am | 32 | Good | 7 | 7 | 48 |
| Mon 5:30 am | 35 | Good | 11.5 | 12 | 57 |
| Mon 8:30 am | 42 | Good | 23.7 | 26 | 70 |
| Mon 11:30 am | 52 | Moderate | 32.1 | 35 | 103 |
| Mon 2:30 pm | 60 | Moderate | 40.6 | 44 | 114 |
| Mon 5:30 pm | 68 | Moderate | 45.4 | 48 | 89 |
| Mon 8:30 pm | 77 | Moderate | 43.4 | 46 | 79 |
| Mon 11:30 pm | 85 | Moderate | 38.6 | 40 | 77 |
| Tue 2:30 am | 93 | Moderate | 36.4 | 38 | 76 |
| Tue 5:30 am | 99 | Moderate | 37 | 39 | 72 |
| Tue 8:30 am | 106 | Unhealthy for Sensitive Groups | 41.6 | 44 | 91 |
| Tue 11:30 am | 112 | Unhealthy for Sensitive Groups | 46.1 | 50 | 140 |
| Tue 2:30 pm | 115 | Unhealthy for Sensitive Groups | 44.8 | 49 | 153 |
| Tue 5:30 pm | 116 | Unhealthy for Sensitive Groups | 43.5 | 46 | 99 |
| Tue 8:30 pm | 113 | Unhealthy for Sensitive Groups | 21.2 | 22 | 72 |
| Tue 11:30 pm | 105 | Unhealthy for Sensitive Groups | 12.3 | 13 | 61 |
Every third hour of the CAMS forecast via Open-Meteo. US AQI uses rolling averages (24 h for particles, 8 h for ozone), so it moves more slowly than the hourly concentrations.
Best time to be outside in Tiruchirappalli today
Between 6 am and 9 pm local time, the cleanest air today is forecast around 6:30 am (AQI 37, Good) and the worst around 9:30 pm (AQI 80). That is a swing of 43 points, so a run or walk around 6:30 am is noticeably better.
Tiruchirappalli vs the rest of India
Across 260 India cities we track, the average US AQI right now is 116 (Unhealthy for Sensitive Groups). Tiruchirappalli at 31 is 85 points cleaner than average.
It ranks 5 of 260 from cleanest to most polluted; the cleanest is Dindigul (26) and the most polluted Karnāl (346).
For context, the median across 3,909 cities worldwide is 57.
Air quality in cities near Tiruchirappalli
| City | Distance | US AQI | Category | PM2.5 µg/m³ |
|---|---|---|---|---|
| Thanjavur | 48 km | 48 | Good | 10.3 |
| Dindigul | 93 km | 26 | Good | 4.8 |
| Kallakurichi | 106 km | 33 | Good | 10.7 |
| Salem | 110 km | 42 | Good | 12.4 |
| Madurai | 118 km | 51 | Moderate | 13.6 |
| Erode | 121 km | 38 | Good | 11.2 |
| Tiruppur | 150 km | 51 | Moderate | 16.2 |
| Gundupālaiyam | 174 km | 30 | Good | 5.8 |
Model vs measured
We found no measured PM2.5 sensor cell within 25 km of Tiruchirappalli, so the numbers on this page are model estimates. Models capture regional pollution well but can miss very local sources such as a busy road or a nearby fire.
Advice for sensitive groups
With the AQI at 31, there is no need for sensitive groups to change plans. People with asthma should still carry their reliever inhaler as usual.
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Values on this page are modelled by CAMS (Copernicus) and served by Open-Meteo; they are estimates for the area around the city centre, not readings from an official monitor.
Nearby cities
More for Tiruchirappalli
Air quality elsewhere
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).