Bangalore vs Kollam
Side-by-side air quality comparison between Bangalore 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 | Bangalore | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 5.10 | 5.50 |
| PM10(µg/m³) | 5.60 | 7.90 |
| NO₂(µg/m³) | 9.50 | 3.80 |
| SO₂(µg/m³) | 4.20 | 1.60 |
| O₃(µg/m³) | 35.00 | 33.00 |
| CO(µg/m³) | 290.00 | 96.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bangalore averaged an AQI of 74 while Kollam averaged 84 — a 10-point (14%) gap, with Kollam the more polluted and Bangalore the cleaner of the two. On 1422 days when both cities reported, Kollam was cleaner on 1136 of them; the average daily gap was 42 AQI points.
Seasonality & days
Bangalore peaks in March, while Kollam peaks in January. Bangalore logged 0.5% Severe days and 42.6% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Bangalore 31 days, Kollam 65 days.
Year-over-year progress
Bangalore has improved by 26 AQI points (26%) from 2016 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Bangalore reached AQI 500 at Silk Board (KSPCB) on 2024-01-10; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Bangalore spans 14 CPCB stations with a 50-point spread (min 49, max 99); Kollam spans 1 stations with a 0-point spread (min 84, max 84).
Verdict
Both Bangalore and Kollam have the same AQI of 9 right now.