Siwan vs Ujjain
Side-by-side air quality comparison between Siwan and Ujjain.
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 | Siwan | Ujjain |
|---|---|---|
| PM2.5(µg/m³) | 114.60 | 29.30 |
| PM10(µg/m³) | 125.70 | 46.00 |
| NO₂(µg/m³) | 44.50 | 7.60 |
| SO₂(µg/m³) | 15.40 | 16.00 |
| O₃(µg/m³) | 54.00 | 53.00 |
| CO(µg/m³) | 761.00 | 208.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Siwan averaged an AQI of 148 while Ujjain averaged 116 — a 32-point (28%) gap, with Siwan the more polluted and Ujjain the cleaner of the two. On 726 days when both cities reported, Ujjain was cleaner on 533 of them; the average daily gap was 90 AQI points.
Seasonality & days
Siwan peaks in January, while Ujjain peaks in November. Siwan logged 5.2% Severe days and 17.7% Good-or-Satisfactory days; Ujjain was 0.1% Severe and 33.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Siwan 13 days, Ujjain 67 days.
Year-over-year progress
Siwan has improved by 184 AQI points (55.4%) from 2021 to 2024; Ujjain has improved by 71 AQI points (38%) over the same window. The worst recorded day for Siwan reached AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30; Ujjain hit AQI 500 at Mahakaleshwar Temple (MPPCB) on 2023-03-10.
Station-level disparity
Siwan spans 1 CPCB stations with a 0-point spread (min 197, max 197); Ujjain spans 1 stations with a 0-point spread (min 131, max 131).
Verdict
🏆 Ujjain has better air quality with an AQI of 49 compared to Siwan's 282. That's a significant difference of 233 points.