Dataset contains data for creating figures in the article. This dataset is associated with the following publication: Sarwar, G., F. Sidi, H. Simon, B. Henderson, J. Willison, R. Gilliam, C. Hogrefe, K. Foley, R. Mathur, and W. Appel. Representing particulate nitrate photolysis over seawater improves CMAQ ozone predictions over the contiguous United States. SCIENCE OF THE TOTAL ENVIRONMENT. Elsevier BV, AMSTERDAM, NETHERLANDS, 970: 178968, (2025).