Prayagraj vs Samastipur
Side-by-side air quality comparison between Prayagraj and Samastipur.
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 | Samastipur |
|---|---|---|
| PM2.5(µg/m³) | 80.10 | 118.00 |
| PM10(µg/m³) | 101.50 | 134.60 |
| NO₂(µg/m³) | 63.30 | 61.60 |
| SO₂(µg/m³) | 16.20 | 18.30 |
| O₃(µg/m³) | 1.00 | 5.00 |
| CO(µg/m³) | 275.00 | 837.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Prayagraj averaged an AQI of 80 while Samastipur averaged 134 — a 54-point (68%) gap, with Samastipur the more polluted and Prayagraj the cleaner of the two. On 484 days when both cities reported, Prayagraj was cleaner on 390 of them; the average daily gap was 70 AQI points.
Seasonality & days
Prayagraj peaks in November, while Samastipur peaks in January. Prayagraj logged 0.2% Severe days and 48% Good-or-Satisfactory days; Samastipur was 1.4% Severe and 23.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Prayagraj 69 days, Samastipur 9 days.
Year-over-year progress
Prayagraj has improved by 42 AQI points (34.4%) from 2021 to 2024; Samastipur has improved by 84 AQI points (38.5%) over the same window. The worst recorded day for Prayagraj reached AQI 416 at Nagar Nigam (UPPCB) on 2021-11-08; Samastipur hit AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01.
Station-level disparity
Prayagraj spans 3 CPCB stations with a 9-point spread (min 96, max 105); Samastipur spans 1 stations with a 0-point spread (min 177, max 177).
Verdict
🏆 Prayagraj has better air quality with an AQI of 167 compared to Samastipur's 293. That's a significant difference of 126 points.