Gorakhpur vs Kolkata
Side-by-side air quality comparison between Gorakhpur 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 | Gorakhpur | Kolkata |
|---|---|---|
| PM2.5(µg/m³) | 104.10 | 71.70 |
| PM10(µg/m³) | 118.70 | 75.70 |
| NO₂(µg/m³) | 73.90 | 22.30 |
| SO₂(µg/m³) | 17.40 | 12.00 |
| O₃(µg/m³) | 0.00 | 60.00 |
| CO(µg/m³) | 522.00 | 392.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gorakhpur averaged an AQI of 109 while Kolkata averaged 101 — a 8-point (8%) gap, with Gorakhpur the more polluted and Kolkata the cleaner of the two. On 867 days when both cities reported, Gorakhpur was cleaner on 657 of them; the average daily gap was 66 AQI points.
Seasonality & days
Gorakhpur peaks in November, while Kolkata peaks in January. Gorakhpur logged 0% Severe days and 57.099999999999994% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Gorakhpur 62 days, Kolkata 75 days.
Year-over-year progress
Gorakhpur has worsened by 7 AQI points (6.9%) from 2021 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Gorakhpur reached AQI 393 at Madan Mohan Malaviya University of Technology (UPPCB) on 2021-11-09; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Gorakhpur spans 1 CPCB stations with a 0-point spread (min 99, max 99); 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 Gorakhpur's 248. That's a significant difference of 108 points.