Gwalior vs Katihar
Side-by-side air quality comparison between Gwalior and Katihar.
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 | Katihar |
|---|---|---|
| PM2.5(µg/m³) | 40.70 | 109.20 |
| PM10(µg/m³) | 97.60 | 114.30 |
| NO₂(µg/m³) | 14.70 | 31.10 |
| SO₂(µg/m³) | 5.70 | 18.30 |
| O₃(µg/m³) | 49.00 | 43.00 |
| CO(µg/m³) | 247.00 | 770.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gwalior averaged an AQI of 136 while Katihar averaged 123 — a 13-point (11%) gap, with Gwalior the more polluted and Katihar the cleaner of the two. On 611 days when both cities reported, Gwalior was cleaner on 314 of them; the average daily gap was 75 AQI points.
Seasonality & days
Gwalior peaks in November, while Katihar peaks in December. Gwalior logged 0.4% Severe days and 31.5% Good-or-Satisfactory days; Katihar was 3.1% Severe and 26.9% Good-or-Satisfactory. Longest clean-air streaks: Gwalior 47 days, Katihar 19 days.
Year-over-year progress
Gwalior has improved by 12 AQI points (8.1%) from 2020 to 2024; Katihar has improved by 188 AQI points (60.5%) over the same window. The worst recorded day for Gwalior reached AQI 450 at City Center (MPPCB) on 2021-11-09; Katihar hit AQI 465 at Mirchaibari (BSPCB) on 2023-01-23.
Station-level disparity
Gwalior spans 4 CPCB stations with a 53-point spread (min 112, max 165); Katihar spans 1 stations with a 0-point spread (min 185, max 185).
Verdict
🏆 Gwalior has better air quality with an AQI of 98 compared to Katihar's 264. That's a significant difference of 166 points.