Algal δ15N values detect a wastewater effluent plume in nearshore and offshore surface waters and three-dimensionally model the plume across a coral reef on Maui, Hawai'i, USA

► The Lahaina WWRF effluent plume affects most of the shallow region at Kahekili. ► The Lahaina WWRF effluent plume rises to the surface waters in the Kahekili area. ► The Lahaina WWRF effluent plume flows south with the most predominant current.