Ghaziabad vs Purnia
Side-by-side air quality comparison between Ghaziabad 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 | Ghaziabad | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 69.60 | 105.90 |
| PM10(µg/m³) | 96.40 | 109.00 |
| NO₂(µg/m³) | 27.40 | 25.20 |
| SO₂(µg/m³) | 11.00 | 20.10 |
| O₃(µg/m³) | 65.00 | 67.00 |
| CO(µg/m³) | 542.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ghaziabad averaged an AQI of 177 while Purnia averaged 133 — a 44-point (33%) gap, with Ghaziabad the more polluted and Purnia the cleaner of the two. On 603 days when both cities reported, Purnia was cleaner on 471 of them; the average daily gap was 100 AQI points.
Seasonality & days
Ghaziabad peaks in November, while Purnia peaks in January. Ghaziabad logged 12.2% Severe days and 13.700000000000001% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Ghaziabad 19 days, Purnia 14 days.
Year-over-year progress
Ghaziabad has improved by 115 AQI points (39.4%) from 2017 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Ghaziabad reached AQI 500 at Vasundhara (UPPCB) on 2017-12-21; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Ghaziabad spans 4 CPCB stations with a 30-point spread (min 198, max 228); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Ghaziabad has better air quality with an AQI of 133 compared to Purnia's 253. That's a significant difference of 120 points.