Dewās vs Katihar
Side-by-side air quality comparison between Dewās 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 | Dewās | Katihar |
|---|---|---|
| PM2.5(µg/m³) | 32.60 | 109.20 |
| PM10(µg/m³) | 47.00 | 114.30 |
| NO₂(µg/m³) | 6.50 | 31.10 |
| SO₂(µg/m³) | 12.50 | 18.30 |
| O₃(µg/m³) | 74.00 | 43.00 |
| CO(µg/m³) | 243.00 | 770.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dewās averaged an AQI of 98 while Katihar averaged 123 — a 25-point (26%) gap, with Katihar the more polluted and Dewās the cleaner of the two. On 894 days when both cities reported, Dewās was cleaner on 719 of them; the average daily gap was 98 AQI points.
Seasonality & days
Both cities see their worst air in December on average. Dewās logged 0% Severe days and 47.7% Good-or-Satisfactory days; Katihar was 3.1% Severe and 26.9% Good-or-Satisfactory. Longest clean-air streaks: Dewās 101 days, Katihar 19 days.
Year-over-year progress
Dewās has improved by 48 AQI points (32.9%) from 2017 to 2024; Katihar has improved by 188 AQI points (60.5%) over the same window. The worst recorded day for Dewās reached AQI 327 at Bhopal Chauraha (MPPCB) on 2023-07-01; Katihar hit AQI 465 at Mirchaibari (BSPCB) on 2023-01-23.
Station-level disparity
Dewās spans 1 CPCB stations with a 0-point spread (min 106, max 106); Katihar spans 1 stations with a 0-point spread (min 185, max 185).
Verdict
🏆 Dewās has better air quality with an AQI of 55 compared to Katihar's 264. That's a significant difference of 209 points.