Darbhanga vs Kolkata
Side-by-side air quality comparison between Darbhanga 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 | Darbhanga | Kolkata |
|---|---|---|
| PM2.5(µg/m³) | 100.60 | 64.70 |
| PM10(µg/m³) | 113.20 | 69.40 |
| NO₂(µg/m³) | 27.00 | 18.10 |
| SO₂(µg/m³) | 18.40 | 13.10 |
| O₃(µg/m³) | 114.00 | 86.00 |
| CO(µg/m³) | 651.00 | 428.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2023, Darbhanga averaged an AQI of 365 while Kolkata averaged 101 — a 264-point (261%) gap, with Darbhanga the more polluted and Kolkata the cleaner of the two. On 396 days when both cities reported, Kolkata was cleaner on 268 of them; the average daily gap was 65 AQI points.
Seasonality & days
Darbhanga peaks in December, while Kolkata peaks in January. Darbhanga logged 7.1% Severe days and 26.9% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Darbhanga 20 days, Kolkata 75 days.
Year-over-year progress
Darbhanga has worsened by 116 AQI points (46.6%) from 2021 to 2023; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Darbhanga reached AQI 473 at Town Hall Lal Bagh (BSPCB) on 2023-01-01; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Darbhanga spans 1 CPCB stations with a 0-point spread (min 208, max 208); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).
Verdict
🏆 Kolkata has better air quality with an AQI of 117 compared to Darbhanga's 236. That's a significant difference of 119 points.