In a particular 3000 km^2 region of southern Sweden, the annual rainfall averages 850 mm, its mean pH is 4.27, and 66% of the hydrogen ion is associated with sulphuric acid, with the reamining 34% derived from nitric acid. Calculate whether soils in the region are subject to excessive sulphate loading if the only source of sulphate is rainfall and if the recommended maximum is set at 20 Kg SO4-2 ha-1.