Kollam vs Silchar
Side-by-side air quality comparison between Kollam and Silchar.
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 | Silchar |
|---|---|---|
| PM2.5(µg/m³) | 5.50 | 35.20 |
| PM10(µg/m³) | 7.90 | 45.10 |
| NO₂(µg/m³) | 3.80 | 10.60 |
| SO₂(µg/m³) | 1.60 | 6.70 |
| O₃(µg/m³) | 33.00 | 100.00 |
| CO(µg/m³) | 96.00 | 270.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kollam averaged an AQI of 84 while Silchar averaged 52 — a 32-point (62%) gap, with Kollam the more polluted and Silchar the cleaner of the two. On 547 days when both cities reported, Silchar was cleaner on 472 of them; the average daily gap was 37 AQI points.
Seasonality & days
Kollam peaks in January, while Silchar peaks in February. Kollam logged 0% Severe days and 81% Good-or-Satisfactory days; Silchar was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Kollam 65 days, Silchar 87 days.
Year-over-year progress
Kollam has improved by 2 AQI points (2.3%) from 2020 to 2024; Silchar has worsened by 11 AQI points (26.8%) over the same window. The worst recorded day for Kollam reached AQI 272 at Polayathode Kollam (PCB) on 2024-04-06; Silchar hit AQI 89 at Tarapur (PCBA) on 2023-04-29.
Station-level disparity
Kollam spans 1 CPCB stations with a 0-point spread (min 84, max 84); Silchar spans 1 stations with a 0-point spread (min 47, max 47).
Verdict
🏆 Kollam has better air quality with an AQI of 9 compared to Silchar's 59.