Source-specific indicators (human) and general indicators (E. coli and enterococci) measured in the estuary. Samples were collected across the hydrograph during the CSO on 20 June 2009 (A) and the rain event on 15 May 2010 (B). Human fecal indicators, human Bacteroides and Lachnospiraceae (Lachno2), were detected at high concentrations following the peak of the discharge for the two urban rivers, the Menomonee and Kininnickinnic rivers. Hydrographs from all events are shown for culture and qPCR in Figures S3–13 and Figures S14–24, respectively. Lowess indicates locally weighted regression using the lowess function in R (R core team, 2017). Dates are day/month/year. DOI: https://doi.org/10.1525/elementa.301.f3