Katihar vs Tirunelveli
Side-by-side air quality comparison between Katihar and Tirunelveli.
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 | Tirunelveli |
|---|---|---|
| PM2.5(µg/m³) | 109.20 | 4.30 |
| PM10(µg/m³) | 114.30 | 5.30 |
| NO₂(µg/m³) | 31.10 | 6.20 |
| SO₂(µg/m³) | 18.30 | 1.80 |
| O₃(µg/m³) | 43.00 | 26.00 |
| CO(µg/m³) | 770.00 | 139.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Tirunelveli averaged 30 — a 93-point (310%) gap, with Katihar the more polluted and Tirunelveli the cleaner of the two. On 89 days when both cities reported, Tirunelveli was cleaner on 86 of them; the average daily gap was 108 AQI points.
Seasonality & days
Katihar peaks in December, while Tirunelveli peaks in October. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Tirunelveli was 0% Severe and 100% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Tirunelveli 31 days.
Year-over-year progress
The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Tirunelveli hit AQI 42 at Municipal Corporation Office (TNPCB) on 2024-10-30.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Tirunelveli spans 1 stations with a 0-point spread (min 30, max 30).
Verdict
🏆 Tirunelveli has better air quality with an AQI of 7 compared to Katihar's 264. That's a significant difference of 257 points.