Cuddalore vs Salem
Side-by-side air quality comparison between Cuddalore 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, Cuddalore averaged an AQI of 52 while Salem averaged 68 — a 16-point (31%) gap, with Salem the more polluted and Cuddalore the cleaner of the two. On 132 days when both cities reported, Cuddalore was cleaner on 96 of them; the average daily gap was 25 AQI points.
Seasonality & days
Cuddalore peaks in January, while Salem peaks in April. Cuddalore logged 0% Severe days and 90.6% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Cuddalore 34 days, Salem 17 days.
Year-over-year progress
The worst recorded day for Cuddalore reached AQI 329 at Kudikadu (TNPCB) on 2024-04-05; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Cuddalore spans 2 CPCB stations with a 11-point spread (min 46, max 57); Salem spans 1 stations with a 0-point spread (min 73, max 73).