Bettiah vs Salem
Side-by-side air quality comparison between Bettiah 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, Bettiah averaged an AQI of 127 while Salem averaged 68 — a 59-point (87%) gap, with Bettiah the more polluted and Salem the cleaner of the two. On 290 days when both cities reported, Salem was cleaner on 250 of them; the average daily gap was 113 AQI points.
Seasonality & days
Bettiah peaks in November, while Salem peaks in April. Bettiah logged 3.2% Severe days and 32.3% Good-or-Satisfactory days; Salem was 0% Severe and 87.1% Good-or-Satisfactory. Longest clean-air streaks: Bettiah 20 days, Salem 17 days.
Year-over-year progress
Bettiah has improved by 73 AQI points (36.5%) from 2021 to 2024; Salem has improved by 5 AQI points (6.8%) over the same window. The worst recorded day for Bettiah reached AQI 470 at Kamalnath Nagar (BSPCB) on 2023-01-01; Salem hit AQI 214 at Sona College of Technology (TNPCB) on 2024-01-15.
Station-level disparity
Bettiah spans 1 CPCB stations with a 0-point spread (min 173, max 173); Salem spans 1 stations with a 0-point spread (min 73, max 73).