Patiala vs Salem
Side-by-side air quality comparison between Patiala and Salem.
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 | Patiala | Salem |
|---|---|---|
| PM2.5(µg/m³) | 79.40 | 13.70 |
| PM10(µg/m³) | 380.90 | 16.40 |
| NO₂(µg/m³) | 13.60 | 15.30 |
| SO₂(µg/m³) | 13.50 | 9.30 |
| O₃(µg/m³) | 90.00 | 37.00 |
| CO(µg/m³) | 640.00 | 240.00 |
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Patiala averaged an AQI of 103 while Salem averaged 68 — a 35-point (51%) gap, with Patiala the more polluted and Salem the cleaner of the two. On 390 days when both cities reported, Salem was cleaner on 293 of them; the average daily gap was 49 AQI points.
Seasonality & days
Patiala peaks in November, while Salem peaks in April. Patiala logged 0.1% Severe days and 54.8% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Patiala 86 days, Salem 17 days.
Year-over-year progress
Patiala has worsened by 8 AQI points (8.4%) from 2018 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Patiala reached AQI 415 at Model Town (PPCB) on 2019-11-03; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Patiala spans 1 CPCB stations with a 0-point spread (min 104, max 104); Salem spans 1 stations with a 0-point spread (min 73, max 73).
Verdict
🏆 Salem has better air quality with an AQI of 23 compared to Patiala's 339. That's a significant difference of 316 points.