The largest loads of phosphorus originated from point sources (56%), with municipalities as the main source, constituting 90% of total point source discharges in 2000, with 44% from diffuse sources. For some Baltic countries, such as Finland and Sweden, agriculture is the major contributor of phosphorus into the Baltic. Three-quarters of nitrate leaching into groundwater is estimated to be from farmland, leading to some eutrophication problems and breaches of drinking water standards.