Dhanbad vs Kollam
Side-by-side air quality comparison between Dhanbad 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 | Dhanbad | Kollam |
|---|---|---|
| PM2.5(µg/m³) | 92.20 | 4.60 |
| PM10(µg/m³) | 100.10 | 7.10 |
| NO₂(µg/m³) | 60.10 | 4.40 |
| SO₂(µg/m³) | 187.20 | 1.50 |
| O₃(µg/m³) | 36.00 | 30.00 |
| CO(µg/m³) | 755.00 | 89.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dhanbad averaged an AQI of 161 while Kollam averaged 84 — a 77-point (92%) gap, with Dhanbad the more polluted and Kollam the cleaner of the two. On 170 days when both cities reported, Kollam was cleaner on 154 of them; the average daily gap was 88 AQI points.
Seasonality & days
Dhanbad peaks in November, while Kollam peaks in January. Dhanbad logged 0.4% Severe days and 3.1% Good-or-Satisfactory days; Kollam was 0% Severe and 81% Good-or-Satisfactory. Longest clean-air streaks: Dhanbad 2 days, Kollam 65 days.
Year-over-year progress
The worst recorded day for Dhanbad reached AQI 436 at Kalakusuma (DMC) on 2024-04-28; Kollam hit AQI 272 at Polayathode Kollam (PCB) on 2024-04-06.
Station-level disparity
Dhanbad spans 2 CPCB stations with a 12-point spread (min 156, max 168); 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 Dhanbad's 208. That's a significant difference of 200 points.