Chandigarh vs Katihar
Side-by-side air quality comparison between Chandigarh 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 | Chandigarh | Katihar |
|---|---|---|
| PM2.5(µg/m³) | 46.30 | 105.90 |
| PM10(µg/m³) | 63.60 | 109.00 |
| NO₂(µg/m³) | 30.10 | 25.20 |
| SO₂(µg/m³) | 10.30 | 20.10 |
| O₃(µg/m³) | 64.00 | 67.00 |
| CO(µg/m³) | 602.00 | 727.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chandigarh averaged an AQI of 153 while Katihar averaged 123 — a 30-point (24%) gap, with Chandigarh the more polluted and Katihar the cleaner of the two. On 973 days when both cities reported, Chandigarh was cleaner on 533 of them; the average daily gap was 76 AQI points.
Seasonality & days
Chandigarh peaks in January, while Katihar peaks in December. Chandigarh logged 0.3% Severe days and 39.9% Good-or-Satisfactory days; Katihar was 3.1% Severe and 26.9% Good-or-Satisfactory. Longest clean-air streaks: Chandigarh 92 days, Katihar 19 days.
Year-over-year progress
Chandigarh has worsened by 27 AQI points (21.4%) from 2019 to 2024; Katihar has improved by 188 AQI points (60.5%) over the same window. The worst recorded day for Chandigarh reached AQI 452 at Sector-53 (CPCC) on 2022-11-09; Katihar hit AQI 465 at Mirchaibari (BSPCB) on 2023-01-23.
Station-level disparity
Chandigarh spans 3 CPCB stations with a 43-point spread (min 107, max 150); Katihar spans 1 stations with a 0-point spread (min 185, max 185).
Verdict
🏆 Chandigarh has better air quality with an AQI of 78 compared to Katihar's 253. That's a significant difference of 175 points.