Ahmedabad vs Purnia
Side-by-side air quality comparison between Ahmedabad 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 | Ahmedabad | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 23.50 | 105.90 |
| PM10(µg/m³) | 38.60 | 109.00 |
| NO₂(µg/m³) | 6.50 | 25.20 |
| SO₂(µg/m³) | 5.20 | 20.10 |
| O₃(µg/m³) | 41.00 | 67.00 |
| CO(µg/m³) | 163.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ahmedabad averaged an AQI of 117 while Purnia averaged 133 — a 16-point (14%) gap, with Purnia the more polluted and Ahmedabad the cleaner of the two. On 881 days when both cities reported, Purnia was cleaner on 470 of them; the average daily gap was 86 AQI points.
Seasonality & days
Ahmedabad peaks in November, while Purnia peaks in January. Ahmedabad logged 0.1% Severe days and 23.7% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Ahmedabad 25 days, Purnia 14 days.
Year-over-year progress
Ahmedabad has worsened by 52 AQI points (80%) from 2016 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Ahmedabad reached AQI 430 at Raikhad (IITM) on 2023-03-17; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Ahmedabad spans 9 CPCB stations with a 44-point spread (min 95, max 139); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Ahmedabad has better air quality with an AQI of 39 compared to Purnia's 253. That's a significant difference of 214 points.