Chandigarh vs Kollam
Side-by-side air quality comparison between Chandigarh and Kollam.
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 | Chandigarh | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 46.30 | 5.50 |
| PM10(µg/m³) | 63.60 | 7.90 |
| NO₂(µg/m³) | 30.10 | 3.80 |
| SO₂(µg/m³) | 10.30 | 1.60 |
| O₃(µg/m³) | 64.00 | 33.00 |
| CO(µg/m³) | 602.00 | 96.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chandigarh averaged an AQI of 153 while Kollam averaged 84 — a 69-point (82%) gap, with Chandigarh the more polluted and Kollam the cleaner of the two. On 1417 days when both cities reported, Kollam was cleaner on 1074 of them; the average daily gap was 77 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Chandigarh logged 0.3% Severe days and 39.9% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Chandigarh 92 days, Kollam 65 days.
Year-over-year progress
Chandigarh has worsened by 27 AQI points (21.4%) from 2019 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Chandigarh reached AQI 452 at Sector-53 (CPCC) on 2022-11-09; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Chandigarh spans 3 CPCB stations with a 43-point spread (min 107, max 150); Kollam spans 1 stations with a 0-point spread (min 84, max 84).
Verdict
🏆 Kollam has better air quality with an AQI of 9 compared to Chandigarh's 78. That's a significant difference of 69 points.