Ajmer vs Siwan
Side-by-side air quality comparison between Ajmer 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 | Ajmer | Siwan |
|---|---|---|
| PM2.5(µg/m³) | 22.90 | 114.60 |
| PM10(µg/m³) | 59.60 | 125.70 |
| NO₂(µg/m³) | 3.00 | 44.50 |
| SO₂(µg/m³) | 4.30 | 15.40 |
| O₃(µg/m³) | 64.00 | 54.00 |
| CO(µg/m³) | 168.00 | 761.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2022, Ajmer averaged an AQI of 112 while Siwan averaged 148 — a 36-point (32%) gap, with Siwan the more polluted and Ajmer the cleaner of the two. On 264 days when both cities reported, Ajmer was cleaner on 213 of them; the average daily gap was 143 AQI points.
Seasonality & days
Ajmer peaks in November, while Siwan peaks in January. Ajmer logged 0% Severe days and 54.300000000000004% Good-or-Satisfactory days; Siwan was 5.2% Severe and 17.7% Good-or-Satisfactory. Longest clean-air streaks: Ajmer 94 days, Siwan 13 days.
Year-over-year progress
Ajmer has improved by 22 AQI points (16.4%) from 2017 to 2022; Siwan has improved by 184 AQI points (55.4%) over the same window. The worst recorded day for Ajmer reached AQI 357 at Civil Lines (RSPCB) on 2021-03-31; Siwan hit AQI 488 at Chitragupta Nagar (BSPCB) on 2022-12-30.
Station-level disparity
Ajmer spans 1 CPCB stations with a 0-point spread (min 102, max 102); Siwan spans 1 stations with a 0-point spread (min 197, max 197).
Verdict
🏆 Ajmer has better air quality with an AQI of 60 compared to Siwan's 282. That's a significant difference of 222 points.