Gwalior vs Purnia
Side-by-side air quality comparison between Gwalior 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 | Gwalior | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 39.10 | 105.90 |
| PM10(µg/m³) | 89.40 | 109.00 |
| NO₂(µg/m³) | 12.30 | 25.20 |
| SO₂(µg/m³) | 6.20 | 20.10 |
| O₃(µg/m³) | 61.00 | 67.00 |
| CO(µg/m³) | 248.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Gwalior averaged an AQI of 136 while Purnia averaged 133 — a 3-point (2%) gap, with Gwalior the more polluted and Purnia the cleaner of the two. On 577 days when both cities reported, Gwalior was cleaner on 294 of them; the average daily gap was 66 AQI points.
Seasonality & days
Gwalior peaks in November, while Purnia peaks in January. Gwalior logged 0.4% Severe days and 31.5% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Gwalior 47 days, Purnia 14 days.
Year-over-year progress
Gwalior has improved by 12 AQI points (8.1%) from 2020 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Gwalior reached AQI 450 at City Center (MPPCB) on 2021-11-09; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Gwalior spans 4 CPCB stations with a 53-point spread (min 112, max 165); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Gwalior has better air quality with an AQI of 90 compared to Purnia's 253. That's a significant difference of 163 points.