Darbhanga — AQI Trends
Year-over-year AQI trajectory for Darbhanga (2021–2023). Based on CPCB station data, 2016–present.
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Darbhanga — annual AQI 2021–2023
Year × month heatmap
Worst single days on record
- 2023-01-01Town Hall Lal Bagh (BSPCB)473
- 2022-12-13Town Hall Lal Bagh (BSPCB)473
- 2022-12-31Town Hall Lal Bagh (BSPCB)470
- 2022-12-30Town Hall Lal Bagh (BSPCB)449
- 2022-12-18Town Hall Lal Bagh (BSPCB)446
- 2022-12-14Town Hall Lal Bagh (BSPCB)446
- 2022-12-15Town Hall Lal Bagh (BSPCB)437
- 2023-01-14Town Hall Lal Bagh (BSPCB)436
- 2022-12-21Town Hall Lal Bagh (BSPCB)433
- 2022-12-20Town Hall Lal Bagh (BSPCB)431
What the numbers say
Overview
Darbhanga's AQI moved from 249 in 2021 to 365 in 2023 — a rise of 46.6% over 2 years. The long-run trend is worsening, with a regression slope of 58.0 AQI points per year.
The data story
The worst recorded year in Darbhanga was 2023 at AQI 365, while the best was 2022 at AQI 193. The city has posted 47.1% of all measured days above AQI 200 (the Poor threshold), and its worst recorded single day hit 473 on 1 Jan 2023.
Why this pattern
A worsening trend in Darbhanga typically reflects rapid urbanisation, vehicle fleet growth outpacing Bharat Stage VI emission benefits, expanding industrial activity, and in some cases new construction dust. The data points the finger at what policy needs to target next: year-round baseline emissions, not just the winter peak.
What to do with this
For planners and residents, the trend matters as much as today's number. A worsening city needs aggressive source control and personal protection investments like indoor purifiers. An improving city rewards continued policy pressure but still requires caution during peak months. Use the live AQI page for day-to-day decisions and this chart for multi-year context. Year-over-year change of more than 10% in either direction is typically real signal, not noise.