Dewās vs Purnia
Side-by-side air quality comparison between Dewās and Purnia.
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 | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 27.80 | 86.40 |
| PM10(µg/m³) | 58.70 | 99.00 |
| NO₂(µg/m³) | 0.90 | 1.80 |
| SO₂(µg/m³) | 5.30 | 22.40 |
| O₃(µg/m³) | 112.00 | 241.00 |
| CO(µg/m³) | 182.00 | 323.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Dewās averaged an AQI of 98 while Purnia averaged 133 — a 35-point (36%) gap, with Purnia the more polluted and Dewās the cleaner of the two. On 816 days when both cities reported, Dewās was cleaner on 630 of them; the average daily gap was 89 AQI points.
Seasonality & days
Dewās peaks in December, while Purnia peaks in January. Dewās logged 0% Severe days and 47.7% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Dewās 101 days, Purnia 14 days.
Year-over-year progress
Dewās has improved by 48 AQI points (32.9%) from 2017 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Dewās reached AQI 327 at Bhopal Chauraha (MPPCB) on 2023-07-01; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Dewās spans 1 CPCB stations with a 0-point spread (min 106, max 106); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Dewās has better air quality with an AQI of 60 compared to Purnia's 188. That's a significant difference of 128 points.