Gwalior vs Howrah
Side-by-side air quality comparison between Gwalior 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 | Gwalior | Howrah |
|---|---|---|
| PM2.5(µg/m³) | 40.70 | 68.70 |
| PM10(µg/m³) | 97.60 | 72.60 |
| NO₂(µg/m³) | 14.70 | 22.20 |
| SO₂(µg/m³) | 5.70 | 11.50 |
| O₃(µg/m³) | 49.00 | 55.00 |
| CO(µg/m³) | 247.00 | 360.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gwalior averaged an AQI of 136 while Howrah averaged 126 — a 10-point (8%) gap, with Gwalior the more polluted and Howrah the cleaner of the two. On 1397 days when both cities reported, Howrah was cleaner on 793 of them; the average daily gap was 62 AQI points.
Seasonality & days
Gwalior peaks in November, while Howrah peaks in December. Gwalior logged 0.4% Severe days and 31.5% Good-or-Satisfactory days; Howrah was 0.7% Severe and 48.7% Good-or-Satisfactory. Longest clean-air streaks: Gwalior 47 days, Howrah 120 days.
Year-over-year progress
Gwalior has improved by 12 AQI points (8.1%) from 2020 to 2024; Howrah has improved by 32 AQI points (20.3%) over the same window. The worst recorded day for Gwalior reached AQI 450 at City Center (MPPCB) on 2021-11-09; Howrah hit AQI 500 at Ghusuri (WBPCB) on 2017-04-15.
Station-level disparity
Gwalior spans 4 CPCB stations with a 53-point spread (min 112, max 165); Howrah spans 5 stations with a 116-point spread (min 111, max 227).
Verdict
🏆 Gwalior has better air quality with an AQI of 98 compared to Howrah's 130.