CR2SUB: monthly groundwater level database for Chile

The CR2SUB database includes groundwater level (GWL) observations from 1,137 wells maintained by the Water Bureau of Chile (Dirección General de Aguas, DGA), downloaded from https://snia.mop.gob.cl/BNAConsultas/reportes, and processed into a homogenized monthly database for the full domain of Chile, for the period 1957-2025. The database has been consolidated within the framework of the Center for Climate and Resilience Research (CR2, ANID/FONDAP/1523A0002) and is part of the research project ANID/FONDECYT/11240924.