The UK Government has produced a briefing paper on the
diffuse pollution of water by agriculture and has summarized measures that have
the potential to reduce the effects on waterbodies by agricultural
activities. This can be found here:
In summary: ‘Surface, coastal and ground waters in England
suffer from significant pollution problems: 78% of surface and groundwater bodies
fail to meet the ‘good’ ecological status prescribed by the EU Water Frameworks
Directive. Pollution increases water treatment costs and adversely affects
wildlife. Compared to treatment, preventing water pollution at source can have
a cost-benefit ratio as high as 1:65.