Hajipur vs Purnia
Side-by-side air quality comparison between Hajipur 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 | Hajipur | Purnia |
|---|---|---|
| PM2.5(µg/m³) | 55.80 | 26.36 |
| PM10(µg/m³) | 82.70 | 53.43 |
| NO₂(µg/m³) | 0.80 | 10.64 |
| SO₂(µg/m³) | 8.90 | 6.95 |
| O₃(µg/m³) | 205.00 | 21.82 |
| CO(µg/m³) | 318.00 | 747.41 |
| NH3(ppb) | — | 11.83 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Hajipur averaged an AQI of 173 while Purnia averaged 133 — a 40-point (30%) gap, with Hajipur the more polluted and Purnia the cleaner of the two. On 847 days when both cities reported, Hajipur was cleaner on 458 of them; the average daily gap was 66 AQI points.
Seasonality & days
Hajipur peaks in December, while Purnia peaks in January. Hajipur logged 0.3% Severe days and 36.6% Good-or-Satisfactory days; Purnia was 3.7% Severe and 33.699999999999996% Good-or-Satisfactory. Longest clean-air streaks: Hajipur 36 days, Purnia 14 days.
Year-over-year progress
Hajipur has worsened by 74 AQI points (74.7%) from 2020 to 2024; Purnia has improved by 163 AQI points (55.1%) over the same window. The worst recorded day for Hajipur reached AQI 427 at Industrial Area (BSPCB) on 2024-11-12; Purnia hit AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15.
Station-level disparity
Hajipur spans 1 CPCB stations with a 0-point spread (min 149, max 149); Purnia spans 1 stations with a 0-point spread (min 176, max 176).
Verdict
🏆 Purnia has better air quality with an AQI of 54 compared to Hajipur's 93.