Katihar vs Siliguri
Side-by-side air quality comparison between Katihar and Siliguri.
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 | Siliguri |
|---|---|---|
| PM2.5(µg/m³) | 105.90 | 77.80 |
| PM10(µg/m³) | 109.00 | 98.30 |
| NO₂(µg/m³) | 25.20 | 11.30 |
| SO₂(µg/m³) | 20.10 | 6.80 |
| O₃(µg/m³) | 67.00 | 115.00 |
| CO(µg/m³) | 727.00 | 523.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Katihar averaged an AQI of 123 while Siliguri averaged 81 — a 42-point (52%) gap, with Katihar the more polluted and Siliguri the cleaner of the two. On 581 days when both cities reported, Siliguri was cleaner on 504 of them; the average daily gap was 93 AQI points.
Seasonality & days
Katihar peaks in December, while Siliguri peaks in February. Katihar logged 3.1% Severe days and 26.9% Good-or-Satisfactory days; Siliguri was 0.1% Severe and 61.8% Good-or-Satisfactory. Longest clean-air streaks: Katihar 19 days, Siliguri 180 days.
Year-over-year progress
Katihar has improved by 188 AQI points (60.5%) from 2021 to 2024; Siliguri has improved by 39 AQI points (32.5%) over the same window. The worst recorded day for Katihar reached AQI 465 at Mirchaibari (BSPCB) on 2023-01-23; Siliguri hit AQI 415 at Ward-32 Bapupara (WBPCB) on 2018-02-08.
Station-level disparity
Katihar spans 1 CPCB stations with a 0-point spread (min 185, max 185); Siliguri spans 1 stations with a 0-point spread (min 107, max 107).
Verdict
🏆 Siliguri has better air quality with an AQI of 160 compared to Katihar's 253. That's a significant difference of 93 points.