Washington (Silver Spring), MD

Latest reading: March 25, 2026

3-month allergy trend

Allergen	Type	Value	Level
Pinaceae	TREE	141	High
Quercus	TREE	64	Moderate
Cladosporium	MOLD	62	Low
Acer	TREE	51	Moderate
Unidentified Fungi	MOLD	35	Low
Basidiospores (Undifferentiated)	MOLD	35	Low
Penicillium / Aspergillus	MOLD	18	Low
Rusts	MOLD	18	Low
Liquidambar	TREE	15	Moderate
Betula	TREE	11	Low
Ascospores (Undifferentiated)	MOLD	9	Low
Celtis	TREE	7	Low

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Long-term historical averages for Tree at Washington (Silver Spring), MD.