Kolkata vs Nagpur
Side-by-side air quality comparison between Kolkata and Nagpur.
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 | Nagpur |
|---|---|---|
| PM2.5(µg/m³) | 68.70 | 20.30 |
| PM10(µg/m³) | 72.60 | 25.30 |
| NO₂(µg/m³) | 22.20 | 23.20 |
| SO₂(µg/m³) | 11.50 | 12.30 |
| O₃(µg/m³) | 55.00 | 42.00 |
| CO(µg/m³) | 364.00 | 174.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Nagpur averaged 104 — a 3-point (3%) gap, with Nagpur the more polluted and Kolkata the cleaner of the two. On 1654 days when both cities reported, Nagpur was cleaner on 1079 of them; the average daily gap was 70 AQI points.
Seasonality & days
Kolkata peaks in January, while Nagpur peaks in November. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Nagpur was 0% Severe and 60.599999999999994% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Nagpur 68 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Nagpur has improved by 37 AQI points (26.2%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Nagpur hit AQI 342 at Opp GPO Civil Lines (MPCB) on 2022-12-03.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Nagpur spans 4 stations with a 9-point spread (min 98, max 107).
Verdict
🏆 Nagpur has better air quality with an AQI of 34 compared to Kolkata's 130. That's a significant difference of 96 points.