AtmoBench

We present AtmoBench, a multi-region multi-
country dataset and benchmark for air quality fore-
casting with time series foundation models and
classical baselines. AtmoBench was constructed
from ground station data from 6 different net-
works, including EPA (United States), CPCB
(India), CNEMC (China), AURN (United King-
dom), Sinaica (Mexico) and EEA (France and
Germany). AtmoBench covers 6 major pollutants
(PM2.5, PM10, NO2, SO2, CO, O3) over a three-
year period from July 2022 to June 2025 across
7 diverse countries and 4 continents,with more
than 14000 station-pollutant series, aiming to pro-
vide a comprehensive benchmark for air quality
tasks.