Ahmedabad vs Katihar
Side-by-side air quality comparison between Ahmedabad 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 | Ahmedabad | Katihar |
|---|---|---|
| CO(ppb) | 913.29 | 335.00 |
| NO2(ppb) | 16.97 | 2.30 |
| O3(ppb) | 2.49 | 239.00 |
| PM10(µg/m³) | 93.43 | 98.70 |
| PM2.5(µg/m³) | 33.21 | 88.20 |
| SO2(ppb) | 1.41 | 24.60 |
| NH3(ppb) | 33.82 | — |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ahmedabad averaged an AQI of 117 while Katihar averaged 123 — a 6-point (5%) gap, with Katihar the more polluted and Ahmedabad the cleaner of the two. On 970 days when both cities reported, Ahmedabad was cleaner on 501 of them; the average daily gap was 86 AQI points.
Seasonality & days
Ahmedabad peaks in November, while Katihar peaks in December. Ahmedabad logged 0.1% Severe days and 23.7% Good-or-Satisfactory days; Katihar was 3.1% Severe and 26.9% Good-or-Satisfactory. Longest clean-air streaks: Ahmedabad 25 days, Katihar 19 days.
Year-over-year progress
Ahmedabad has worsened by 52 AQI points (80%) from 2016 to 2024; Katihar has improved by 188 AQI points (60.5%) over the same window. The worst recorded day for Ahmedabad reached AQI 430 at Raikhad (IITM) on 2023-03-17; Katihar hit AQI 465 at Mirchaibari (BSPCB) on 2023-01-23.
Station-level disparity
Ahmedabad spans 9 CPCB stations with a 44-point spread (min 95, max 139); Katihar spans 1 stations with a 0-point spread (min 185, max 185).
Verdict
🏆 Ahmedabad has better air quality with an AQI of 94 compared to Katihar's 194. That's a significant difference of 100 points.