“…The P load from Metro has been the primary driver of cultural eutrophication in the lake (Effler et al 2005, Effler et al 2008a. Concentrations of TP in this effluent (TP Metro ), and thereby its TP load (TP Metro/L ), have decreased in response to multiple management actions, including a ban on high P content detergents within the service area in 1971 (Murphy 1973) and treatment upgrades, particularly in 1979 (secondary treatment), 1981 (tertiary treatment) and 2005 (high rate flocculated settling).…”