Guwahati vs Salem
Side-by-side air quality comparison between Guwahati 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, Guwahati averaged an AQI of 123 while Salem averaged 68 — a 55-point (81%) gap, with Guwahati the more polluted and Salem the cleaner of the two. On 392 days when both cities reported, Salem was cleaner on 354 of them; the average daily gap was 99 AQI points.
Seasonality & days
Guwahati peaks in January, while Salem peaks in April. Guwahati logged 0.1% Severe days and 44.9% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Guwahati 105 days, Salem 17 days.
Year-over-year progress
Guwahati has worsened by 14 AQI points (12.8%) from 2019 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Guwahati reached AQI 420 at Railway Colony (PCBA) on 2023-01-15; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Guwahati spans 4 CPCB stations with a 26-point spread (min 118, max 144); Salem spans 1 stations with a 0-point spread (min 73, max 73).