Bettiah vs Kolkata
Side-by-side air quality comparison between Bettiah and Kolkata.
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 Kolkata averaged 101 — a 26-point (26%) gap, with Bettiah the more polluted and Kolkata the cleaner of the two. On 527 days when both cities reported, Kolkata was cleaner on 306 of them; the average daily gap was 65 AQI points.
Seasonality & days
Bettiah peaks in November, while Kolkata peaks in January. Bettiah logged 3.2% Severe days and 32.3% Good-or-Satisfactory days; Kolkata was 1% Severe and 47.800000000000004% Good-or-Satisfactory. Longest clean-air streaks: Bettiah 20 days, Kolkata 75 days.
Year-over-year progress
Bettiah has improved by 73 AQI points (36.5%) from 2021 to 2024; Kolkata has improved by 76 AQI points (42.9%) over the same window. The worst recorded day for Bettiah reached AQI 470 at Kamalnath Nagar (BSPCB) on 2023-01-01; Kolkata hit AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23.
Station-level disparity
Bettiah spans 1 CPCB stations with a 0-point spread (min 173, max 173); Kolkata spans 7 stations with a 56-point spread (min 95, max 151).