Chennai vs Saharsa
Side-by-side air quality comparison between Chennai and Saharsa.
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 Saharsa averaged 139 — a 71-point (104%) gap, with Saharsa the more polluted and Chennai the cleaner of the two. On 603 days when both cities reported, Chennai was cleaner on 430 of them; the average daily gap was 103 AQI points.
Seasonality & days
Chennai peaks in December, while Saharsa peaks in January. Chennai logged 0% Severe days and 57.5% Good-or-Satisfactory days; Saharsa was 1.4% Severe and 28.4% Good-or-Satisfactory. Longest clean-air streaks: Chennai 53 days, Saharsa 20 days.
Year-over-year progress
Chennai has improved by 25 AQI points (26.9%) from 2017 to 2024; Saharsa has improved by 139 AQI points (50%) over the same window. The worst recorded day for Chennai reached AQI 391 at Kodungaiyur (TNPCB) on 2021-05-14; Saharsa hit AQI 454 at Police Line (BSPCB) on 2022-12-13.
Station-level disparity
Chennai spans 9 CPCB stations with a 27-point spread (min 63, max 90); Saharsa spans 1 stations with a 0-point spread (min 188, max 188).