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D'Ann L. Williams, DrPH

Assistant Scientist

Departmental Affiliation(s):

Environmental Health Sciences

Contact Information

3038 Barclay Street
Baltimore , Maryland   21218



DrPH , Johns Hopkins Bloomberg School of Public Health , 2010
MS , Johns Hopkins University , 2002

Honors and Awards

USDA, Agricultural Air Quality Task Force Member 2010 - Present

Award for Teaching Excellence, Principles of Occupational and Environmental Hygiene, Online, 2012

Johns Hopkins Bloomberg School of Public Health, Center for a Livable Future, Pre-doctoral Fellowship, 2007, 2008 and 2009

David Swift Fund in Environmental Health Engineering 2007


exposure assessment, air quality, particulate matter, agriculture, allergens, endotoxin, sampling methods, sample design, community exposures, Hurricane Katrina, WTC, World Trade Center

  • Williams DL, Breysse PN, McCormack MC, Diette GR, McKenzie S, Geyh AS. Airborne Cow Allergen, Ammonia and Particulate Matter at Homes Vary with Distance to Industrial Scale Dairy Operations: An Exposure Assessment. Environmental Health 10 (72). (2011) DOI:10.1186/1476-069X-10-72.

  • Williams DL, Breysse PN, McCormack MC, Diette GR, McKenzie S, Geyh AS. Cow allergen and endotoxin in settled dust in homes proximate to industrial scale dairy operations. (In process) 

  • Mazique, D, Diette, GB, Breysse, PN, Matsui, EC, McCormack, MC, Curtin-Brosnan, J, Williams DL, Peng, RD, Hansel, NN. Predictors of airborne endotoxin in inner-city homes.  Environmental Research 111(4):614-617. (2011) 

  • McCormack MC, Breysse PN, Matsui EC, Hansel NN, Peng RD, Curtin-Brosnan J, Williams DL, Wills-Karp M, Diette GD.  Indoor Particulate Matter Increases Asthma Morbidity in Children with Non-Atopic and Atopic Asthma.  Ann of Allergy  Asthma Immunol. 106(4):308-315. (2011)

  • McCormack MC, Breysse PN, Matsui EC, Hansel NN, Williams DL, Curtin-Brosnan J, Eggleston P, Diette GB; Center for Childhood Asthma in the Urban Environment. In-home particle concentrations and childhood asthma morbidity.  Environmental Health Perspectives, 117(2):294-8. (2009)