Bilaspur vs Kollam
Side-by-side air quality comparison between Bilaspur 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 | Bilaspur | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 38.80 | 5.50 |
| PM10(µg/m³) | 47.40 | 7.90 |
| NO₂(µg/m³) | 22.60 | 3.80 |
| SO₂(µg/m³) | 15.90 | 1.60 |
| O₃(µg/m³) | 56.00 | 33.00 |
| CO(µg/m³) | 481.00 | 96.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bilaspur averaged an AQI of 61 while Kollam averaged 84 — a 23-point (38%) gap, with Kollam the more polluted and Bilaspur the cleaner of the two. On 839 days when both cities reported, Bilaspur was cleaner on 525 of them; the average daily gap was 28 AQI points.
Seasonality & days
Bilaspur peaks in December, while Kollam peaks in January. Bilaspur logged 0% Severe days and 88% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Bilaspur 66 days, Kollam 65 days.
Year-over-year progress
Bilaspur has improved by 22 AQI points (26.5%) from 2021 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Bilaspur reached AQI 259 at Mangala (NTPC) on 2023-03-09; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Bilaspur spans 1 CPCB stations with a 0-point spread (min 69, max 69); Kollam spans 1 stations with a 0-point spread (min 84, max 84).
Verdict
🏆 Kollam has better air quality with an AQI of 9 compared to Bilaspur's 65. That's a significant difference of 56 points.