Asansol vs Katihar
Side-by-side air quality comparison between Asansol and Katihar.
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 | Asansol | Katihar |
|---|---|---|
| PM2.5(µg/m³) | 91.00 | 105.90 |
| PM10(µg/m³) | 96.20 | 109.00 |
| NO₂(µg/m³) | 48.00 | 25.20 |
| SO₂(µg/m³) | 91.90 | 20.10 |
| O₃(µg/m³) | 58.00 | 67.00 |
| CO(µg/m³) | 838.00 | 727.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Asansol averaged an AQI of 145 while Katihar averaged 123 — a 22-point (18%) gap, with Asansol the more polluted and Katihar the cleaner of the two. On 604 days when both cities reported, Asansol was cleaner on 313 of them; the average daily gap was 76 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Asansol logged 0% Severe days and 43.3% Good-or-Satisfactory days; Katihar was 3.1% Severe and 26.9% Good-or-Satisfactory. Longest clean-air streaks: Asansol 44 days, Katihar 19 days.
Year-over-year progress
Asansol has worsened by 12 AQI points (9%) from 2018 to 2024; Katihar has improved by 188 AQI points (60.5%) over the same window. The worst recorded day for Asansol reached AQI 394 at Court Area (WBPCB) on 2022-12-13; Katihar hit AQI 465 at Mirchaibari (BSPCB) on 2023-01-23.
Station-level disparity
Asansol spans 4 CPCB stations with a 40-point spread (min 123, max 163); Katihar spans 1 stations with a 0-point spread (min 185, max 185).
Verdict
🏆 Asansol has better air quality with an AQI of 204 compared to Katihar's 253.