Ghaziabad vs Salem
Side-by-side air quality comparison between Ghaziabad 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
CPCB Multi-Year History (2016–2024)
Summary
Overview
In 2024, Ghaziabad averaged an AQI of 177 while Salem averaged 68 — a 109-point (160%) gap, with Ghaziabad the more polluted and Salem the cleaner of the two. On 208 days when both cities reported, Salem was cleaner on 206 of them; the average daily gap was 174 AQI points.
Seasonality & days
Ghaziabad peaks in November, while Salem peaks in April. Ghaziabad logged 12.2% Severe days and 13.700000000000001% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Ghaziabad 19 days, Salem 17 days.
Year-over-year progress
Ghaziabad has improved by 115 AQI points (39.4%) from 2017 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Ghaziabad reached AQI 500 at Vasundhara (UPPCB) on 2017-12-21; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Ghaziabad spans 4 CPCB stations with a 30-point spread (min 198, max 228); Salem spans 1 stations with a 0-point spread (min 73, max 73).