Bhilai vs Kollam
Side-by-side air quality comparison between Bhilai 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 | Bhilai | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 46.40 | 4.70 |
| PM10(µg/m³) | 52.30 | 7.20 |
| NO₂(µg/m³) | 43.70 | 4.00 |
| SO₂(µg/m³) | 70.60 | 1.50 |
| O₃(µg/m³) | 42.00 | 31.00 |
| CO(µg/m³) | 675.00 | 91.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Bhilai averaged an AQI of 73 while Kollam averaged 84 — a 11-point (15%) gap, with Kollam the more polluted and Bhilai the cleaner of the two. On 648 days when both cities reported, Bhilai was cleaner on 356 of them; the average daily gap was 37 AQI points.
Seasonality & days
Bhilai peaks in November, while Kollam peaks in January. Bhilai logged 0% Severe days and 71.6% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Bhilai 119 days, Kollam 65 days.
Year-over-year progress
Bhilai has worsened by 8 AQI points (12.3%) from 2021 to 2024; Kollam has improved by 2 AQI points (2.3%) over the same window. The worst recorded day for Bhilai reached AQI 288 at Hathkhoj (CECB) on 2023-12-26; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Bhilai spans 3 CPCB stations with a 25-point spread (min 59, max 84); 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 Bhilai's 78. That's a significant difference of 70 points.