Dhanbad vs Kolkata
Side-by-side air quality comparison between Dhanbad and Kolkata.
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 | Kolkata |
|---|---|---|
| PM2.5(µg/m³) | 89.90 | 71.70 |
| PM10(µg/m³) | 96.90 | 75.70 |
| NO₂(µg/m³) | 54.10 | 22.30 |
| SO₂(µg/m³) | 171.70 | 12.00 |
| O₃(µg/m³) | 60.00 | 60.00 |
| CO(µg/m³) | 495.00 | 392.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dhanbad averaged an AQI of 161 while Kolkata averaged 101 — a 60-point (59%) gap, with Dhanbad the more polluted and Kolkata the cleaner of the two. On 226 days when both cities reported, Kolkata was cleaner on 161 of them; the average daily gap was 78 AQI points.
Seasonality & days
Dhanbad peaks in November, while Kolkata peaks in January. Dhanbad logged 0.4% Severe days and 3.1% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Dhanbad 2 days, Kolkata 75 days.
Year-over-year progress
The worst recorded day for Dhanbad reached AQI 436 at Kalakusuma (DMC) on 2024-04-28; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Dhanbad spans 2 CPCB stations with a 12-point spread (min 156, max 168); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).
Verdict
🏆 Kolkata has better air quality with an AQI of 140 compared to Dhanbad's 200. That's a significant difference of 60 points.