Kolkata vs Navi Mumbai
Side-by-side air quality comparison between Kolkata and Navi Mumbai.
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 | Navi Mumbai |
|---|---|---|
| PM2.5(µg/m³) | 71.70 | 22.80 |
| PM10(µg/m³) | 75.70 | 40.50 |
| NO₂(µg/m³) | 22.30 | 23.40 |
| SO₂(µg/m³) | 12.00 | 22.10 |
| O₃(µg/m³) | 60.00 | 18.00 |
| CO(µg/m³) | 392.00 | 150.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Kolkata averaged an AQI of 101 while Navi Mumbai averaged 107 — a 6-point (6%) gap, with Navi Mumbai the more polluted and Kolkata the cleaner of the two. On 1973 days when both cities reported, Navi Mumbai was cleaner on 1004 of them; the average daily gap was 63 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Navi Mumbai was 0.2% Severe and 43.6% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Navi Mumbai 57 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Navi Mumbai has worsened by 29 AQI points (37.2%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Navi Mumbai hit AQI 477 at Airoli Navi (MPCB) on 2019-04-14.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Navi Mumbai spans 8 stations with a 37-point spread (min 93, max 130).
Verdict
🏆 Navi Mumbai has better air quality with an AQI of 41 compared to Kolkata's 140. That's a significant difference of 99 points.