Purnia vs Sirohi
Side-by-side air quality comparison between Purnia and Sirohi.
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 | Sirohi |
|---|---|---|
| PM2.5(µg/m³) | 112.00 | 19.80 |
| PM10(µg/m³) | 115.70 | 33.50 |
| NO₂(µg/m³) | 31.10 | 5.10 |
| SO₂(µg/m³) | 18.40 | 2.60 |
| O₃(µg/m³) | 42.00 | 50.00 |
| CO(µg/m³) | 756.00 | 131.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Purnia averaged an AQI of 133 while Sirohi averaged 89 — a 44-point (49%) gap, with Purnia the more polluted and Sirohi the cleaner of the two. On 445 days when both cities reported, Sirohi was cleaner on 354 of them; the average daily gap was 69 AQI points.
Seasonality & days
Purnia peaks in January, while Sirohi peaks in December. Purnia logged 3.7% Severe days and 33.699999999999996% Good-or-Satisfactory days; Sirohi was 0% Severe and 69.2% Good-or-Satisfactory. Longest clean-air streaks: Purnia 14 days, Sirohi 41 days.
Year-over-year progress
Purnia has improved by 163 AQI points (55.1%) from 2021 to 2024; Sirohi has improved by 4 AQI points (4.3%) over the same window. The worst recorded day for Purnia reached AQI 460 at Mariam Nagar (BSPCB) on 2022-12-15; Sirohi hit AQI 335 at Vedhaynath Colony (RSPCB) on 2024-12-26.
Station-level disparity
Purnia spans 1 CPCB stations with a 0-point spread (min 176, max 176); Sirohi spans 1 stations with a 0-point spread (min 90, max 90).
Verdict
🏆 Sirohi has better air quality with an AQI of 34 compared to Purnia's 274. That's a significant difference of 240 points.