Ludhiana vs Shillong
Side-by-side air quality comparison between Ludhiana and Shillong.
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 | Shillong |
|---|---|---|
| PM2.5(µg/m³) | 43.20 | 24.90 |
| PM10(µg/m³) | 65.90 | 29.30 |
| NO₂(µg/m³) | 2.70 | 1.20 |
| SO₂(µg/m³) | 11.00 | 4.00 |
| O₃(µg/m³) | 188.00 | 143.00 |
| CO(µg/m³) | 342.00 | 292.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2021, Ludhiana averaged an AQI of 117 while Shillong averaged 75 — a 42-point (56%) gap, with Ludhiana the more polluted and Shillong the cleaner of the two. On 475 days when both cities reported, Shillong was cleaner on 429 of them; the average daily gap was 79 AQI points.
Seasonality & days
Ludhiana peaks in November, while Shillong peaks in February. Ludhiana logged 0.3% Severe days and 53.599999999999994% Good-or-Satisfactory days; Shillong was 0% Severe and 92% Good-or-Satisfactory. Longest clean-air streaks: Ludhiana 53 days, Shillong 113 days.
Year-over-year progress
Ludhiana has improved by 79 AQI points (40.3%) from 2017 to 2021; Shillong has worsened by 41 AQI points (120.6%) over the same window. The worst recorded day for Ludhiana reached AQI 488 at Punjab Agricultural University (PPCB) on 2018-06-14; Shillong hit AQI 212 at Lumpyngngad Shillong (PCB) on 2024-02-19.
Station-level disparity
Ludhiana spans 1 CPCB stations with a 0-point spread (min 118, max 118); Shillong spans 2 stations with a 2-point spread (min 42, max 44).
Verdict
🏆 Shillong has better air quality with an AQI of 42 compared to Ludhiana's 73.