Data described concentrations of human adenovirus, crAssphage and Pepper Mild Mottle virus in 1 hour composite wastewater samples and 24 h composite wastewater samples. This dataset is not publicly accessible because: Data is the property of CSIRO. It can be accessed through the following means: Contact Warish Ahmed, Warish.Ahmed@csiro.au. Format: Data is in excel format. This dataset is associated with the following publication: Ahmed, W., A. Bivins, P.M. Bertsch, K. Bibby, P. Gyawali, S.P. Sherchan, S.L. Simpson, K.V. Thomas, R. Verhagen, M. Kitajima, J.F. Mueller, and A. Korajkic. Intraday variability of indicator and pathogenic viruses in 1-h and 24-h composite wastewater samples: Implications for wastewater-based epidemiology. ENVIRONMENTAL RESEARCH. Elsevier B.V., Amsterdam, NETHERLANDS, 193: 110531, (2021).