Kollam vs Sirohi
Side-by-side air quality comparison between Kollam and Sirohi.
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 | Sirohi |
|---|---|---|
| PM2.5(µg/m³) | 4.70 | 20.00 |
| PM10(µg/m³) | 7.20 | 34.70 |
| NO₂(µg/m³) | 4.00 | 4.30 |
| SO₂(µg/m³) | 1.50 | 2.90 |
| O₃(µg/m³) | 31.00 | 51.00 |
| CO(µg/m³) | 91.00 | 127.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kollam averaged an AQI of 84 while Sirohi averaged 89 — a 5-point (6%) gap, with Sirohi the more polluted and Kollam the cleaner of the two. On 462 days when both cities reported, Kollam was cleaner on 261 of them; the average daily gap was 37 AQI points.
Seasonality & days
Kollam peaks in January, while Sirohi peaks in December. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Sirohi was 0% Severe and 69.2% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Sirohi 41 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Sirohi has improved by 4 AQI points (4.3%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Sirohi hit AQI 335 at Vedhaynath Colony (RSPCB) on 2024-12-26.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Sirohi spans 1 stations with a 0-point spread (min 90, max 90).
Verdict
🏆 Kollam has better air quality with an AQI of 8 compared to Sirohi's 35.