Do I have to pay an annual fee to the Environment Agency for discharging the effluent from my reed-bed to a watercourse or pond?

At the present time only if the discharge is greater than 5.0 m3/day

Charges are also related to the volume of the discharge, the content of the discharge, the nature of the receiving water and a financial factor.

For further information on this click on the following link:
http://www.environment-agency.gov.uk/business/regulation/38807.aspx