Mumbai vs Salem
Side-by-side air quality comparison between Mumbai 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, Mumbai averaged an AQI of 93 while Salem averaged 68 — a 25-point (37%) gap, with Mumbai 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 133 AQI points.
Seasonality & days
Mumbai peaks in December, while Salem peaks in April. Mumbai logged 0.5% Severe days and 34% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Mumbai 58 days, Salem 17 days.
Year-over-year progress
Mumbai has improved by 4 AQI points (4.1%) from 2016 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Mumbai reached AQI 500 at Vile Parle West (MPCB) on 2022-08-15; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Mumbai spans 29 CPCB stations with a 74-point spread (min 77, max 151); Salem spans 1 stations with a 0-point spread (min 73, max 73).