Ahmednagar vs Kolkata
Side-by-side air quality comparison between Ahmednagar 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 | Ahmednagar | Kolkata |
|---|---|---|
| PM2.5(µg/m³) | 15.00 | 68.70 |
| PM10(µg/m³) | 28.80 | 72.60 |
| NO₂(µg/m³) | 9.30 | 22.20 |
| SO₂(µg/m³) | 9.30 | 11.50 |
| O₃(µg/m³) | 34.00 | 55.00 |
| CO(µg/m³) | 129.00 | 364.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ahmednagar averaged an AQI of 109 while Kolkata averaged 101 — a 8-point (8%) gap, with Ahmednagar the more polluted and Kolkata the cleaner of the two. On 294 days when both cities reported, Ahmednagar was cleaner on 179 of them; the average daily gap was 50 AQI points.
Seasonality & days
Ahmednagar peaks in November, while Kolkata peaks in January. Ahmednagar logged 0% Severe days and 50.1% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Ahmednagar 13 days, Kolkata 75 days.
Year-over-year progress
Ahmednagar has worsened by 15 AQI points (16%) from 2023 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Ahmednagar reached AQI 259 at Tarakpur (MPCB) on 2024-12-18; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Ahmednagar spans 1 CPCB stations with a 0-point spread (min 104, max 104); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).
Verdict
🏆 Ahmednagar has better air quality with an AQI of 29 compared to Kolkata's 130. That's a significant difference of 101 points.