Chennai vs Samastipur
Side-by-side air quality comparison between Chennai 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, Chennai averaged an AQI of 68 while Samastipur averaged 134 — a 66-point (97%) gap, with Samastipur the more polluted and Chennai the cleaner of the two. On 485 days when both cities reported, Chennai was cleaner on 386 of them; the average daily gap was 83 AQI points.
Seasonality & days
Chennai peaks in December, while Samastipur peaks in January. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Samastipur was 1.4% Severe and 23.400000000000002% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Samastipur 9 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Samastipur has improved by 84 AQI points (38.5%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Samastipur hit AQI 459 at DM Office Kasipur (BSPCB) on 2023-01-01.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Samastipur spans 1 stations with a 0-point spread (min 177, max 177).