Hapur vs Siwan
Side-by-side air quality comparison between Hapur 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 | Hapur | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 71.90 | 108.00 |
| PM10(µg/m³) | 97.30 | 122.50 |
| NO₂(µg/m³) | 36.60 | 59.80 |
| SO₂(µg/m³) | 11.50 | 14.10 |
| O₃(µg/m³) | 36.00 | 4.00 |
| CO(µg/m³) | 589.00 | 856.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Hapur averaged an AQI of 142 while Siwan averaged 148 — a 6-point (4%) gap, with Siwan the more polluted and Hapur the cleaner of the two. On 769 days when both cities reported, Hapur was cleaner on 495 of them; the average daily gap was 94 AQI points.
Seasonality & days
Hapur peaks in November, while Siwan peaks in January. Hapur logged 1.9% Severe days and 36.2% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Hapur 55 days, Siwan 13 days.
Year-over-year progress
Hapur has improved by 197 AQI points (58.1%) from 2018 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Hapur reached AQI 477 at Anand Vihar (UPPCB) on 2019-10-31; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Hapur spans 1 CPCB stations with a 0-point spread (min 159, max 159); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Hapur has better air quality with an AQI of 140 compared to Siwan's 260. That's a significant difference of 120 points.