Chapra vs Salem
Side-by-side air quality comparison between Chapra 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, Chapra averaged an AQI of 149 while Salem averaged 68 — a 81-point (119%) gap, with Chapra the more polluted and Salem the cleaner of the two. On 339 days when both cities reported, Salem was cleaner on 304 of them; the average daily gap was 138 AQI points.
Seasonality & days
Chapra peaks in January, while Salem peaks in April. Chapra logged 2.4% Severe days and 26.8% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Chapra 14 days, Salem 17 days.
Year-over-year progress
Chapra has improved by 181 AQI points (54.8%) from 2021 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Chapra reached AQI 452 at Darshan Nagar (BSPCB) on 2022-12-20; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Chapra spans 1 CPCB stations with a 0-point spread (min 195, max 195); Salem spans 1 stations with a 0-point spread (min 73, max 73).