Coimbatore vs Thiruvananthapuram
Side-by-side air quality comparison between Coimbatore and Thiruvananthapuram.
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 | Coimbatore | Thiruvananthapuram |
|---|---|---|
| PM2.5(µg/m³) | 2.60 | 5.50 |
| PM10(µg/m³) | 2.80 | 10.00 |
| NO₂(µg/m³) | 4.10 | 1.60 |
| SO₂(µg/m³) | 2.20 | 0.40 |
| O₃(µg/m³) | 47.00 | 38.00 |
| CO(µg/m³) | 169.00 | 117.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Coimbatore averaged an AQI of 66 while Thiruvananthapuram averaged 56 — a 10-point (18%) gap, with Coimbatore the more polluted and Thiruvananthapuram the cleaner of the two. On 990 days when both cities reported, Thiruvananthapuram was cleaner on 493 of them; the average daily gap was 22 AQI points.
Seasonality & days
Coimbatore peaks in November, while Thiruvananthapuram peaks in January. Coimbatore logged 0% Severe days and 90.5% Good-or-Satisfactory days; Thiruvananthapuram was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Coimbatore 32 days, Thiruvananthapuram 172 days.
Year-over-year progress
Coimbatore has improved by 5 AQI points (7%) from 2019 to 2024; Thiruvananthapuram has improved by 11 AQI points (16.4%) over the same window. The worst recorded day for Coimbatore reached AQI 279 at SIDCO Kurichi (TNPCB) on 2024-09-28; Thiruvananthapuram hit AQI 387 at Plammoodu Thiruvananthapuram (PCB) on 2021-08-30.
Station-level disparity
Coimbatore spans 2 CPCB stations with a 1-point spread (min 63, max 64); Thiruvananthapuram spans 2 stations with a 7-point spread (min 57, max 64).
Verdict
🏆 Coimbatore has better air quality with an AQI of 4 compared to Thiruvananthapuram's 10.