Kolkata vs Samastipur
Side-by-side air quality comparison between Kolkata and Samastipur.
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, Kolkata averaged an AQI of 101 while Samastipur averaged 134 — a 33-point (33%) gap, with Samastipur the more polluted and Kolkata the cleaner of the two. On 485 days when both cities reported, Kolkata was cleaner on 348 of them; the average daily gap was 65 AQI points.
Seasonality & days
Both cities see their worst air in January on average. Kolkata logged 1% Severe days and 47.800000000000004% Good-or-Satisfactory days; Samastipur was 1.4% Severe and 23.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Kolkata 75 days, Samastipur 9 days.
Year-over-year progress
Kolkata has improved by 76 AQI points (42.9%) from 2017 to 2024; Samastipur has improved by 84 AQI points (38.5%) over the same window. The worst recorded day for Kolkata reached AQI 453 at Rabindra Bharati University (WBPCB) on 2019-01-23; Samastipur hit AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01.
Station-level disparity
Kolkata spans 7 CPCB stations with a 56-point spread (min 95, max 151); Samastipur spans 1 stations with a 0-point spread (min 177, max 177).