Katihar vs Puducherry
Side-by-side air quality comparison between Katihar and Puducherry.
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 | Puducherry |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 16.40 |
| PM10(µg/m³) | 109.00 | 19.20 |
| NO₂(µg/m³) | 25.20 | 18.50 |
| SO₂(µg/m³) | 20.10 | 8.80 |
| O₃(µg/m³) | 67.00 | 37.00 |
| CO(µg/m³) | 727.00 | 394.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Puducherry averaged 55 — a 68-point (124%) gap, with Katihar the more polluted and Puducherry the cleaner of the two. On 930 days when both cities reported, Puducherry was cleaner on 863 of them; the average daily gap was 132 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Puducherry was 0% Severe and 95.4% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Puducherry 117 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Puducherry has worsened by 1 AQI points (1.9%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Puducherry hit AQI 274 at Jawahar Nagar (PPCC) on 2022-10-25.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Puducherry spans 1 stations with a 0-point spread (min 56, max 56).
Verdict
🏆 Puducherry has better air quality with an AQI of 27 compared to Katihar's 253. That's a significant difference of 226 points.