Katihar vs Ludhiana
Side-by-side air quality comparison between Katihar and Ludhiana.
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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Ludhiana averaged 117 — a 6-point (5%) gap, with Katihar the more polluted and Ludhiana the cleaner of the two. On 36 days when both cities reported, Ludhiana was cleaner on 32 of them; the average daily gap was 147 AQI points.
Seasonality & days
Katihar peaks in December, while Ludhiana peaks in November. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Ludhiana was 0.3% Severe and 53.599999999999994% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Ludhiana 53 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Ludhiana has improved by 79 AQI points (40.3%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Ludhiana hit AQI 488 at Punjab Agricultural University (PPCB) on 2018-06-14.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Ludhiana spans 1 stations with a 0-point spread (min 118, max 118).