Purnia vs Surat
Side-by-side air quality comparison between Purnia and Surat.
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 | Purnia | Surat |
|---|---|---|
| PM2.5(µg/m³) | 112.00 | 23.90 |
| PM10(µg/m³) | 115.70 | 45.10 |
| NO₂(µg/m³) | 31.10 | 22.90 |
| SO₂(µg/m³) | 18.40 | 38.50 |
| O₃(µg/m³) | 42.00 | 33.00 |
| CO(µg/m³) | 756.00 | 249.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Surat averaged 83 — a 50-point (60%) gap, with Purnia the more polluted and Surat the cleaner of the two. On 479 days when both cities reported, Surat was cleaner on 354 of them; the average daily gap was 92 AQI points.
Seasonality & days
Purnia peaks in January, while Surat peaks in November. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Surat was 0% Severe and 55.9% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Surat 55 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Surat has improved by 139 AQI points (62.6%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Surat hit AQI 384 at Science Center (SMC) on 2023-08-19.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Surat spans 1 stations with a 0-point spread (min 123, max 123).
Verdict
🏆 Surat has better air quality with an AQI of 45 compared to Purnia's 274. That's a significant difference of 229 points.