Asansol vs Thiruvananthapuram
Side-by-side air quality comparison between Asansol 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 | Asansol | Thiruvananthapuram |
|---|---|---|
| PM2.5(µg/m³) | 89.60 | 5.50 |
| PM10(µg/m³) | 95.50 | 10.00 |
| NO₂(µg/m³) | 48.70 | 1.70 |
| SO₂(µg/m³) | 82.10 | 0.50 |
| O₃(µg/m³) | 39.00 | 37.00 |
| CO(µg/m³) | 708.00 | 85.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Asansol averaged an AQI of 145 while Thiruvananthapuram averaged 56 — a 89-point (159%) gap, with Asansol the more polluted and Thiruvananthapuram the cleaner of the two. On 1941 days when both cities reported, Thiruvananthapuram was cleaner on 1646 of them; the average daily gap was 79 AQI points.
Seasonality & days
Asansol peaks in December, while Thiruvananthapuram peaks in January. Asansol logged 0% Severe days and 43.3% Good-or-Satisfactory days; Thiruvananthapuram was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Asansol 44 days, Thiruvananthapuram 172 days.
Year-over-year progress
Asansol has worsened by 12 AQI points (9%) from 2018 to 2024; Thiruvananthapuram has improved by 11 AQI points (16.4%) over the same window. The worst recorded day for Asansol reached AQI 394 at Court Area (WBPCB) on 2022-12-13; Thiruvananthapuram hit AQI 387 at Plammoodu Thiruvananthapuram (PCB) on 2021-08-30.
Station-level disparity
Asansol spans 4 CPCB stations with a 40-point spread (min 123, max 163); Thiruvananthapuram spans 2 stations with a 7-point spread (min 57, max 64).
Verdict
🏆 Thiruvananthapuram has better air quality with an AQI of 10 compared to Asansol's 199. That's a significant difference of 189 points.