River Can

Roxwell Brook Pressures

The table below shows the current pressures that this waterbody faces and the solutions that could be put in place to solve these problems. You can learn more about some of these pressures and solutions on the Environment Agency Catchment Data Explorer or you can contact us to find out more.



    Diffuse pollution




    Physical modification


    Fish passage


    Invasive species


    Point source



Japanese Knotweed has been most recently recorded on this water body in 2014. This plant not only shades out native plants, but also causes serious damage to buildings.


Japanese Knotweed can be removed by spraying or injecting its roots with pesticides, this takes time to kill the plant, but it is effective. Just digging up this plant is, unfortunately, not enough.


Signal Crayfish have been most recently recorded on this water body in 2009. Signal Crayfish cause changes to the natural bankside habitat and also out-compete our native crayfish. They are fierce predators and can completely change fish and invertebrate communities so that they are no longer in their natural state.


There is currently no known solution to the invasion of Signal Crayfish, regular monitoring is needed to ensure a strategic approach when a solution has been identified.


There is a sewage treatment works on this waterbody which could be having an impact on the phosphate levels here.

In order to reduce the phosphate entering the water, phosphate stripping techniques could be introduced to the sewage treatment works.

This waterbody is classified as 'poor' for phosphates. Diffused agricultural pollution could be a reason for this increased phosphate level.

Carry out farm visits to determine the extent of agricultural run-off and understand fluctuations in phosphate better.

If agricultural run-off is confirmed, work with landowners to reduce the phosphate run off into this waterbody.

Website key stakeholders:

Environment Agency logo      Essex Wildlife Trust logo           ESWT Logo 70

Design by LTD Design Consultants and build by Garganey Consulting based on an original concept by Herts and Middlesex Wildlife Trust