Farm nutrient emissions to surface water

Excess nutrients in surface water may lead to excessive algal blooms, for example, significantly reducing visibility and worsing.Gross emissions are discharges at the level of the site. Net emissions take into account any purification at a public sewage treatment plant. The companies’ share of the net emissions of nitrogen (N) and phosphorus (P) to surface water.Both gross and net emissions of nitrogen and phosphorus from companies have decreased, but in recent years this decrease has been low. Within business disposals, trading services account for the largest share of gross emissions of nitrogen and phosphorus. Chemicals account for the largest share of net emissions.地表水中过量的营养盐可引发藻类水华过度暴发，例如会显著降低水体能见度并加剧水质恶化。总排放量指场址层级的直接排放行为。净排放量需将公共污水处理厂的净化处理量纳入核算范畴。企业排入地表水的氮（N）与磷（P）净排放量的占比情况。企业氮、磷的总排放量与净排放量均呈下降态势，但近年来该降幅已趋于平缓。在企业各类排放源中，贸易服务业的氮、磷总排放量占比最高。化学工业则是氮、磷净排放量占比最高的领域。