Charkhi Dādri vs Purnia
Side-by-side air quality comparison between Charkhi Dādri 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 | Charkhi Dādri | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 67.80 | 105.90 |
| PM10(µg/m³) | 219.30 | 109.00 |
| NO₂(µg/m³) | 11.50 | 25.20 |
| SO₂(µg/m³) | 9.90 | 20.10 |
| O₃(µg/m³) | 99.00 | 67.00 |
| CO(µg/m³) | 416.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Charkhi Dādri averaged an AQI of 145 while Purnia averaged 133 — a 12-point (9%) gap, with Charkhi Dādri the more polluted and Purnia the cleaner of the two. On 845 days when both cities reported, Charkhi Dādri was cleaner on 454 of them; the average daily gap was 76 AQI points.
Seasonality & days
Charkhi Dādri peaks in November, while Purnia peaks in January. Charkhi Dādri logged 0.7% Severe days and 28% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Charkhi Dādri 48 days, Purnia 14 days.
Year-over-year progress
Charkhi Dādri has improved by 51 AQI points (26%) from 2020 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Charkhi Dādri reached AQI 470 at Mini Secretariat Charkhi (HSPCB) on 2021-11-12; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Charkhi Dādri spans 1 CPCB stations with a 0-point spread (min 162, max 162); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Charkhi Dādri has better air quality with an AQI of 180 compared to Purnia's 253. That's a significant difference of 73 points.