Samastipur vs Shillong
Side-by-side air quality comparison between Samastipur and Shillong.
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 | Samastipur | Shillong |
|---|---|---|
| PM2.5(µg/m³) | 124.30 | 18.30 |
| PM10(µg/m³) | 140.20 | 21.80 |
| NO₂(µg/m³) | 60.30 | 3.60 |
| SO₂(µg/m³) | 19.10 | 6.20 |
| O₃(µg/m³) | 14.00 | 109.00 |
| CO(µg/m³) | 804.00 | 309.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Samastipur averaged an AQI of 134 while Shillong averaged 75 — a 59-point (79%) gap, with Samastipur the more polluted and Shillong the cleaner of the two. On 354 days when both cities reported, Shillong was cleaner on 325 of them; the average daily gap was 130 AQI points.
Seasonality & days
Samastipur peaks in January, while Shillong peaks in February. Samastipur logged 1.4% Severe days and 23.400000000000002% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Samastipur 9 days, Shillong 113 days.
Year-over-year progress
Samastipur has improved by 84 AQI points (38.5%) from 2022 to 2024; Shillong has worsened by 41 AQI points (120.6%) over the same window. The worst recorded day for Samastipur reached AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Samastipur spans 1 CPCB stations with a 0-point spread (min 177, max 177); Shillong spans 2 stations with a 2-point spread (min 42, max 44).
Verdict
🏆 Shillong has better air quality with an AQI of 31 compared to Samastipur's 304. That's a significant difference of 273 points.