Chapra vs Katihar
Side-by-side air quality comparison between Chapra 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 | Chapra | Katihar |
|---|---|---|
| PM2.5(µg/m³) | 99.00 | 109.20 |
| PM10(µg/m³) | 115.50 | 114.30 |
| NO₂(µg/m³) | 53.70 | 31.10 |
| SO₂(µg/m³) | 13.70 | 18.30 |
| O₃(µg/m³) | 10.00 | 43.00 |
| CO(µg/m³) | 858.00 | 770.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Chapra averaged an AQI of 149 while Katihar averaged 123 — a 26-point (21%) gap, with Chapra the more polluted and Katihar the cleaner of the two. On 840 days when both cities reported, Katihar was cleaner on 465 of them; the average daily gap was 52 AQI points.
Seasonality & days
Chapra peaks in January, while Katihar peaks in December. Chapra logged 2.4% Severe days and 26.8% Good-or-Satisfactory days; Katihar was 3.1% Severe and 26.9% Good-or-Satisfactory. Longest clean-air streaks: Chapra 14 days, Katihar 19 days.
Year-over-year progress
Chapra has improved by 181 AQI points (54.8%) from 2021 to 2024; Katihar has improved by 188 AQI points (60.5%) over the same window. The worst recorded day for Chapra reached AQI 452 at Darshan Nagar (BSPCB) on 2022-12-20; Katihar hit AQI 465 at Mirchaibari (BSPCB) on 2023-01-23.
Station-level disparity
Chapra spans 1 CPCB stations with a 0-point spread (min 195, max 195); Katihar spans 1 stations with a 0-point spread (min 185, max 185).
Verdict
🏆 Chapra has better air quality with an AQI of 231 compared to Katihar's 264.