Katihar vs Thrissur
Side-by-side air quality comparison between Katihar and Thrissur.
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 | Thrissur |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 8.60 |
| PM10(µg/m³) | 109.00 | 10.10 |
| NO₂(µg/m³) | 25.20 | 9.80 |
| SO₂(µg/m³) | 20.10 | 3.30 |
| O₃(µg/m³) | 67.00 | 29.00 |
| CO(µg/m³) | 727.00 | 163.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Thrissur averaged 57 — a 66-point (116%) gap, with Katihar the more polluted and Thrissur the cleaner of the two. On 736 days when both cities reported, Thrissur was cleaner on 661 of them; the average daily gap was 116 AQI points.
Seasonality & days
Katihar peaks in December, while Thrissur peaks in February. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Thrissur was 0% Severe and 88.4% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Thrissur 52 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Thrissur has improved by 21 AQI points (26.9%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Thrissur hit AQI 181 at Corporation Ground Thrissur (PCB) on 2023-01-09.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Thrissur spans 1 stations with a 0-point spread (min 68, max 68).
Verdict
🏆 Thrissur has better air quality with an AQI of 14 compared to Katihar's 253. That's a significant difference of 239 points.