Ariyalur vs Salem
Side-by-side air quality comparison between Ariyalur 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, Ariyalur averaged an AQI of 46 while Salem averaged 68 — a 22-point (48%) gap, with Salem the more polluted and Ariyalur the cleaner of the two. On 286 days when both cities reported, Ariyalur was cleaner on 228 of them; the average daily gap was 31 AQI points.
Seasonality & days
Ariyalur peaks in March, while Salem peaks in April. Ariyalur logged 0% Severe days and 93.8% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Ariyalur 57 days, Salem 17 days.
Year-over-year progress
Ariyalur has improved by 35 AQI points (43.2%) from 2022 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Ariyalur reached AQI 221 at Keelapalur (TNPCB) on 2024-04-07; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Ariyalur spans 1 CPCB stations with a 0-point spread (min 51, max 51); Salem spans 1 stations with a 0-point spread (min 73, max 73).