Hapur vs Purnia
Side-by-side air quality comparison between Hapur 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 | Hapur | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 69.60 | 105.90 |
| PM10(µg/m³) | 96.40 | 109.00 |
| NO₂(µg/m³) | 27.40 | 25.20 |
| SO₂(µg/m³) | 11.00 | 20.10 |
| O₃(µg/m³) | 65.00 | 67.00 |
| CO(µg/m³) | 548.00 | 707.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Hapur averaged an AQI of 142 while Purnia averaged 133 — a 9-point (7%) gap, with Hapur the more polluted and Purnia the cleaner of the two. On 833 days when both cities reported, Hapur was cleaner on 496 of them; the average daily gap was 78 AQI points.
Seasonality & days
Hapur peaks in November, while Purnia peaks in January. Hapur logged 1.9% Severe days and 36.2% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Hapur 55 days, Purnia 14 days.
Year-over-year progress
Hapur has improved by 197 AQI points (58.1%) from 2018 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Hapur reached AQI 477 at Anand Vihar (UPPCB) on 2019-10-31; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Hapur spans 1 CPCB stations with a 0-point spread (min 159, max 159); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Hapur has better air quality with an AQI of 133 compared to Purnia's 253. That's a significant difference of 120 points.