Katihar vs Kochi
Side-by-side air quality comparison between Katihar and Kochi.
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 | Katihar | Kochi |
|---|---|---|
| PM2.5(µg/m³) | 109.20 | 7.80 |
| PM10(µg/m³) | 114.30 | 9.90 |
| NO₂(µg/m³) | 31.10 | 10.00 |
| SO₂(µg/m³) | 18.30 | 2.70 |
| O₃(µg/m³) | 43.00 | 24.00 |
| CO(µg/m³) | 770.00 | 125.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Kochi averaged 91 — a 32-point (35%) gap, with Katihar the more polluted and Kochi the cleaner of the two. On 609 days when both cities reported, Kochi was cleaner on 539 of them; the average daily gap was 117 AQI points.
Seasonality & days
Katihar peaks in December, while Kochi peaks in January. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Kochi was 0% Severe and 70.9% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Kochi 80 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Kochi has worsened by 7 AQI points (8.3%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Kochi hit AQI 293 at Vyttila Kochi (PCB) on 2022-12-08.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Kochi spans 1 stations with a 0-point spread (min 88, max 88).
Verdict
🏆 Kochi has better air quality with an AQI of 13 compared to Katihar's 264. That's a significant difference of 251 points.