Ahmedabad vs Howrah
Side-by-side air quality comparison between Ahmedabad and Howrah.
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 | Ahmedabad | Howrah |
|---|---|---|
| PM2.5(µg/m³) | 22.60 | 68.70 |
| PM10(µg/m³) | 36.90 | 72.60 |
| NO₂(µg/m³) | 7.00 | 22.20 |
| SO₂(µg/m³) | 4.70 | 11.50 |
| O₃(µg/m³) | 40.00 | 55.00 |
| CO(µg/m³) | 159.00 | 360.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ahmedabad averaged an AQI of 117 while Howrah averaged 126 — a 9-point (8%) gap, with Howrah the more polluted and Ahmedabad the cleaner of the two. On 2098 days when both cities reported, Howrah was cleaner on 1210 of them; the average daily gap was 83 AQI points.
Seasonality & days
Ahmedabad peaks in November, while Howrah peaks in December. Ahmedabad logged 0.1% Severe days and 23.7% Good-or-Satisfactory days; Howrah was 0.7% Severe and 48.7% Good-or-Satisfactory. Longest clean-air streaks: Ahmedabad 25 days, Howrah 120 days.
Year-over-year progress
Ahmedabad has worsened by 52 AQI points (80%) from 2016 to 2024; Howrah has improved by 32 AQI points (20.3%) over the same window. The worst recorded day for Ahmedabad reached AQI 430 at Raikhad (IITM) on 2023-03-17; Howrah hit AQI 500 at Ghusuri (WBPCB) on 2017-04-15.
Station-level disparity
Ahmedabad spans 9 CPCB stations with a 44-point spread (min 95, max 139); Howrah spans 5 stations with a 116-point spread (min 111, max 227).
Verdict
🏆 Ahmedabad has better air quality with an AQI of 38 compared to Howrah's 130. That's a significant difference of 92 points.