The goal of GEO Task US-09-01a is to identify critical Earth observations for various societal benefit areas (SBAs). This analysis focuses on identifying end user requirements for the Health SBA- Aeroallergens Sub-Area, which addresses airborne substances such as pollen and spores. The task was supported by an Analyst and a 16-member Advisory Group, representing 12 GEO countries and spanning four continents. The team identified documents specifying Earth observation requirements related to aeroallergens.