Sheep dip: groundwater protection code

Defra: Sheep dip is a hazardous substance – follow this code to reduce the risk of groundwater pollution when you use, store and dispose of dip. Groundwater lies below the surface of the ground. If you carelessly use or release toxic sheep dip on your land it could pollute groundwater. Polluted groundwater can drain into and contaminate drinking water sources such as boreholes, wells and streams.  By following this code of practice you can reduce the risk of causing groundwater pollution. If groundwater is polluted and you’re prosecuted, it will help your defence if you can show you followed the guidance

https://www.gov.uk/guidance/sheep-dip-groundwater-protection-code