Prayagraj vs Siwan
Side-by-side air quality comparison between Prayagraj and Siwan.
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 | Prayagraj | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 61.00 | 114.60 |
| PM10(µg/m³) | 73.80 | 125.70 |
| NO₂(µg/m³) | 45.90 | 44.50 |
| SO₂(µg/m³) | 15.60 | 15.40 |
| O₃(µg/m³) | 36.00 | 54.00 |
| CO(µg/m³) | 240.00 | 761.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Prayagraj averaged an AQI of 80 while Siwan averaged 148 — a 68-point (85%) gap, with Siwan the more polluted and Prayagraj the cleaner of the two. On 490 days when both cities reported, Prayagraj was cleaner on 404 of them; the average daily gap was 87 AQI points.
Seasonality & days
Prayagraj peaks in November, while Siwan peaks in January. Prayagraj logged 0.2% Severe days and 48% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Prayagraj 69 days, Siwan 13 days.
Year-over-year progress
Prayagraj has improved by 42 AQI points (34.4%) from 2021 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Prayagraj reached AQI 416 at Nagar Nigam (UPPCB) on 2021-11-08; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Prayagraj spans 3 CPCB stations with a 9-point spread (min 96, max 105); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Prayagraj has better air quality with an AQI of 104 compared to Siwan's 282. That's a significant difference of 178 points.