Kolkata vs Rourkela
Side-by-side air quality comparison between Kolkata and Rourkela.
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 | Kolkata | Rourkela |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 111.80 |
| PM10(µg/m³) | 69.40 | 123.90 |
| NO₂(µg/m³) | 18.10 | 35.70 |
| SO₂(µg/m³) | 13.10 | 23.90 |
| O₃(µg/m³) | 86.00 | 66.00 |
| CO(µg/m³) | 428.00 | 408.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Rourkela averaged 115 — a 14-point (14%) gap, with Rourkela the more polluted and Kolkata the cleaner of the two. On 395 days when both cities reported, Kolkata was cleaner on 208 of them; the average daily gap was 51 AQI points.
Seasonality & days
Kolkata peaks in January, while Rourkela peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Rourkela was 0% Severe and 32.9% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Rourkela 60 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Rourkela has improved by 112 AQI points (49.3%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Rourkela hit AQI 344 at Raghunathpali (OSPCB) on 2024-01-01.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Rourkela spans 3 stations with a 29-point spread (min 106, max 135).
Verdict
🏆 Kolkata has better air quality with an AQI of 117 compared to Rourkela's 273. That's a significant difference of 156 points.