Ludhiana vs Ujjain
Side-by-side air quality comparison between Ludhiana 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 | Ludhiana | Ujjain |
|---|---|---|
| PM2.5(µg/m³) | 71.50 | 29.30 |
| PM10(µg/m³) | 100.40 | 46.00 |
| NO₂(µg/m³) | 31.30 | 7.60 |
| SO₂(µg/m³) | 17.00 | 16.00 |
| O₃(µg/m³) | 62.00 | 53.00 |
| CO(µg/m³) | 748.00 | 208.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2021, Ludhiana averaged an AQI of 117 while Ujjain averaged 116 — a 1-point (1%) gap, with Ludhiana the more polluted and Ujjain the cleaner of the two. On 1392 days when both cities reported, Ludhiana was cleaner on 876 of them; the average daily gap was 54 AQI points.
Seasonality & days
Both cities see their worst air in November on average. Ludhiana logged 0.3% Severe days and 53.599999999999994% Good-or-Satisfactory days; Ujjain was 0.1% Severe and 33.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Ludhiana 53 days, Ujjain 67 days.
Year-over-year progress
Ludhiana has improved by 79 AQI points (40.3%) from 2017 to 2021; Ujjain has improved by 71 AQI points (38%) over the same window. The worst recorded day for Ludhiana reached AQI 488 at Punjab Agricultural University (PPCB) on 2018-06-14; Ujjain hit AQI 500 at Mahakaleshwar Temple (MPPCB) on 2023-03-10.
Station-level disparity
Ludhiana spans 1 CPCB stations with a 0-point spread (min 118, max 118); 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 Ludhiana's 139. That's a significant difference of 90 points.