Guwahati vs Kollam
Side-by-side air quality comparison between Guwahati 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 | Guwahati | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 32.70 | 4.60 |
| PM10(µg/m³) | 36.10 | 7.10 |
| NO₂(µg/m³) | 6.40 | 4.40 |
| SO₂(µg/m³) | 4.00 | 1.50 |
| O₃(µg/m³) | 84.00 | 30.00 |
| CO(µg/m³) | 393.00 | 89.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Guwahati averaged an AQI of 123 while Kollam averaged 84 — a 39-point (46%) gap, with Guwahati the more polluted and Kollam the cleaner of the two. On 1416 days when both cities reported, Kollam was cleaner on 994 of them; the average daily gap was 73 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Guwahati logged 0.1% Severe days and 44.9% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Guwahati 105 days, Kollam 65 days.
Year-over-year progress
Guwahati has worsened by 14 AQI points (12.8%) from 2019 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Guwahati reached AQI 420 at Railway Colony (PCBA) on 2023-01-15; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Guwahati spans 4 CPCB stations with a 26-point spread (min 118, max 144); Kollam spans 1 stations with a 0-point spread (min 84, max 84).
Verdict
🏆 Kollam has better air quality with an AQI of 8 compared to Guwahati's 55.