Ludhiana vs Prayagraj
Side-by-side air quality comparison between Ludhiana and Prayagraj.
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 | Prayagraj |
|---|---|---|
| PM2.5(µg/m³) | 81.70 | 80.10 |
| PM10(µg/m³) | 109.20 | 101.50 |
| NO₂(µg/m³) | 40.40 | 63.30 |
| SO₂(µg/m³) | 15.20 | 16.20 |
| O₃(µg/m³) | 35.00 | 1.00 |
| CO(µg/m³) | 797.00 | 275.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2021, Ludhiana averaged an AQI of 117 while Prayagraj averaged 80 — a 37-point (46%) gap, with Ludhiana the more polluted and Prayagraj the cleaner of the two. On 198 days when both cities reported, Prayagraj was cleaner on 103 of them; the average daily gap was 53 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; Prayagraj was 0.2% Severe and 48% Good-or-Satisfactory. Longest clean-air streaks: Ludhiana 53 days, Prayagraj 69 days.
Year-over-year progress
Ludhiana has improved by 79 AQI points (40.3%) from 2017 to 2021; Prayagraj has improved by 42 AQI points (34.4%) over the same window. The worst recorded day for Ludhiana reached AQI 488 at Punjab Agricultural University (PPCB) on 2018-06-14; Prayagraj hit AQI 416 at Nagar Nigam (UPPCB) on 2021-11-08.
Station-level disparity
Ludhiana spans 1 CPCB stations with a 0-point spread (min 118, max 118); Prayagraj spans 3 stations with a 9-point spread (min 96, max 105).
Verdict
🏆 Prayagraj has better air quality with an AQI of 167 compared to Ludhiana's 173.