Imphal vs Siwan
Side-by-side air quality comparison between Imphal and Siwan.
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 | Imphal | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 45.80 | 108.00 |
| PM10(µg/m³) | 53.10 | 122.50 |
| NO₂(µg/m³) | 12.00 | 59.80 |
| SO₂(µg/m³) | 2.30 | 14.10 |
| O₃(µg/m³) | 33.00 | 4.00 |
| CO(µg/m³) | 414.00 | 856.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Imphal averaged an AQI of 110 while Siwan averaged 148 — a 38-point (35%) gap, with Siwan the more polluted and Imphal the cleaner of the two. On 333 days when both cities reported, Imphal was cleaner on 231 of them; the average daily gap was 91 AQI points.
Seasonality & days
Imphal peaks in October, while Siwan peaks in January. Imphal logged 1.1% Severe days and 49.400000000000006% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Imphal 103 days, Siwan 13 days.
Year-over-year progress
Imphal has worsened by 23 AQI points (26.4%) from 2022 to 2024; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Imphal reached AQI 500 at University Imphal (PCB) on 2024-10-11; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Imphal spans 2 CPCB stations with a 4-point spread (min 97, max 101); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Imphal has better air quality with an AQI of 77 compared to Siwan's 260. That's a significant difference of 183 points.