Thiruvananthapuram vs Tiruchirappalli
Side-by-side air quality comparison between Thiruvananthapuram and Tiruchirappalli.
Live AQI from Open-Meteo CAMS (~45 km global model, updated hourly). Multi-year history from CPCB station data via aqinow.co pipeline (2016–2024, station-level daily records).
AQI Comparison
Pollutant-level comparison (PM2.5, PM10, O3, NO2, SO2, CO)▾
| Pollutant | Thiruvananthapuram | Tiruchirappalli |
|---|---|---|
| PM2.5(µg/m³) | 5.30 | 5.60 |
| PM10(µg/m³) | 9.50 | 6.40 |
| NO₂(µg/m³) | 1.50 | 6.80 |
| SO₂(µg/m³) | 0.40 | 3.40 |
| O₃(µg/m³) | 38.00 | 40.00 |
| CO(µg/m³) | 102.00 | 134.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Thiruvananthapuram averaged an AQI of 56 while Tiruchirappalli averaged 50 — a 6-point (12%) gap, with Thiruvananthapuram the more polluted and Tiruchirappalli the cleaner of the two. On 82 days when both cities reported, Tiruchirappalli was cleaner on 60 of them; the average daily gap was 30 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Thiruvananthapuram logged 0% Severe days and 92% Good-or-Satisfactory days; Tiruchirappalli was 0% Severe and 96.5% Good-or-Satisfactory. Longest clean-air streaks: Thiruvananthapuram 172 days, Tiruchirappalli 46 days.
Year-over-year progress
Thiruvananthapuram has improved by 11 AQI points (16.4%) from 2017 to 2024; Tiruchirappalli has improved by 23 AQI points (31.5%) over the same window. The worst recorded day for Thiruvananthapuram reached AQI 387 at Plammoodu Thiruvananthapuram (PCB) on 2021-08-30; Tiruchirappalli hit AQI 114 at St Joseph College (TNPCB) on 2024-01-14.
Station-level disparity
Thiruvananthapuram spans 2 CPCB stations with a 7-point spread (min 57, max 64); Tiruchirappalli spans 1 stations with a 0-point spread (min 52, max 52).
Verdict
🏆 Tiruchirappalli has better air quality with an AQI of 9 compared to Thiruvananthapuram's 10.