Sagar vs Samastipur
Side-by-side air quality comparison between Sagar 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 | Sagar | Samastipur |
|---|---|---|
| PM2.5(µg/m³) | 25.90 | 118.00 |
| PM10(µg/m³) | 49.60 | 134.60 |
| NO₂(µg/m³) | 14.50 | 61.60 |
| SO₂(µg/m³) | 3.20 | 18.30 |
| O₃(µg/m³) | 48.00 | 5.00 |
| CO(µg/m³) | 223.00 | 837.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Sagar averaged an AQI of 96 while Samastipur averaged 134 — a 38-point (40%) gap, with Samastipur the more polluted and Sagar the cleaner of the two. On 460 days when both cities reported, Sagar was cleaner on 348 of them; the average daily gap was 85 AQI points.
Seasonality & days
Sagar peaks in November, while Samastipur peaks in January. Sagar logged 0% Severe days and 69.9% Good-or-Satisfactory days; Samastipur was 1.4% Severe and 23.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Sagar 57 days, Samastipur 9 days.
Year-over-year progress
Sagar has worsened by 24 AQI points (33.3%) from 2020 to 2024; Samastipur has improved by 84 AQI points (38.5%) over the same window. The worst recorded day for Sagar reached AQI 347 at Civil Lines (MPPCB) on 2024-12-25; Samastipur hit AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01.
Station-level disparity
Sagar spans 2 CPCB stations with a 45-point spread (min 73, max 118); Samastipur spans 1 stations with a 0-point spread (min 177, max 177).
Verdict
🏆 Sagar has better air quality with an AQI of 50 compared to Samastipur's 293. That's a significant difference of 243 points.