Katihar vs Virudhunagar
Side-by-side air quality comparison between Katihar and Virudhunagar.
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 | Virudhunagar |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 5.30 |
| PM10(µg/m³) | 109.00 | 6.10 |
| NO₂(µg/m³) | 25.20 | 6.70 |
| SO₂(µg/m³) | 20.10 | 3.00 |
| O₃(µg/m³) | 67.00 | 35.00 |
| CO(µg/m³) | 727.00 | 129.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Virudhunagar averaged 52 — a 71-point (137%) gap, with Katihar the more polluted and Virudhunagar the cleaner of the two. On 153 days when both cities reported, Virudhunagar was cleaner on 147 of them; the average daily gap was 97 AQI points.
Seasonality & days
Katihar peaks in December, while Virudhunagar peaks in November. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Virudhunagar was 0% Severe and 92.3% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Virudhunagar 31 days.
Year-over-year progress
The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Virudhunagar hit AQI 173 at Collectorate Office (TNPCB) on 2024-11-07.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Virudhunagar spans 1 stations with a 0-point spread (min 52, max 52).
Verdict
🏆 Virudhunagar has better air quality with an AQI of 9 compared to Katihar's 253. That's a significant difference of 244 points.