Kollam vs Surat
Side-by-side air quality comparison between Kollam and Surat.
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 | Kollam | Surat |
|---|---|---|
| PM2.5(µg/m³) | 4.60 | 23.90 |
| PM10(µg/m³) | 7.10 | 45.10 |
| NO₂(µg/m³) | 4.40 | 22.90 |
| SO₂(µg/m³) | 1.50 | 38.50 |
| O₃(µg/m³) | 30.00 | 33.00 |
| CO(µg/m³) | 89.00 | 249.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kollam averaged an AQI of 84 while Surat averaged 83 — a 1-point (1%) gap, with Kollam the more polluted and Surat the cleaner of the two. On 494 days when both cities reported, Kollam was cleaner on 299 of them; the average daily gap was 74 AQI points.
Seasonality & days
Kollam peaks in January, while Surat peaks in November. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Surat was 0% Severe and 55.9% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Surat 55 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Surat has improved by 139 AQI points (62.6%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Surat hit AQI 384 at Science Center (SMC) on 2023-08-19.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Surat spans 1 stations with a 0-point spread (min 123, max 123).
Verdict
🏆 Kollam has better air quality with an AQI of 8 compared to Surat's 45.