Howrah vs Mumbai
Side-by-side air quality comparison between Howrah and 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 | Howrah | Mumbai |
|---|---|---|
| PM2.5(µg/m³) | 64.70 | 17.50 |
| PM10(µg/m³) | 69.40 | 40.70 |
| NO₂(µg/m³) | 18.10 | 11.00 |
| SO₂(µg/m³) | 13.10 | 12.60 |
| O₃(µg/m³) | 86.00 | 42.00 |
| CO(µg/m³) | 421.00 | 196.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Howrah averaged an AQI of 126 while Mumbai averaged 93 — a 33-point (35%) gap, with Howrah the more polluted and Mumbai the cleaner of the two. On 2255 days when both cities reported, Howrah was cleaner on 1287 of them; the average daily gap was 67 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Howrah logged 0.7% Severe days and 48.7% Good-or-Satisfactory days; Mumbai was 0.5% Severe and 34% Good-or-Satisfactory. Longest clean-air streaks: Howrah 120 days, Mumbai 58 days.
Year-over-year progress
Howrah has improved by 32 AQI points (20.3%) from 2016 to 2024; Mumbai has improved by 4 AQI points (4.1%) over the same window. The worst recorded day for Howrah reached AQI 500 at Ghusuri (WBPCB) on 2017-04-15; Mumbai hit AQI 500 at Vile Parle West (MPCB) on 2022-08-15.
Station-level disparity
Howrah spans 5 CPCB stations with a 116-point spread (min 111, max 227); Mumbai spans 29 stations with a 74-point spread (min 77, max 151).
Verdict
🏆 Mumbai has better air quality with an AQI of 41 compared to Howrah's 117. That's a significant difference of 76 points.