AtmoBench

We present AtmoBench, a multi-region multi-country dataset and benchmark for air quality fore-casting with time series foundation models andclassical baselines. AtmoBench was constructedfrom 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 andGermany). AtmoBench covers 6 major pollutants(PM2.5, PM10, NO2, SO2, CO, O3) over a three-year period from July 2022 to June 2025 across7 diverse countries and 4 continents,with morethan 14000 station-pollutant series, aiming to pro-vide a comprehensive benchmark for air qualitytasks.