River Roach

Prittle 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 2011 . 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.


This river has been historically modified, measures were put in place, but these were not taken forward.

Take forward the original measures which include carrying out river restoration projects that improve drainage and increase in-channel diversity.

Phosphate levels within this waterbody are considered to be too high and therefore have a 'poor' classification and ammonia levels which are 'moderate. The point source inputs need to be identified although there is a sewage treatment works that discharges into this waterbody.

Identify point source inputs.

Ensure that sewage effluent standards are maintained.

Look in to the installation of a tertiary treatment for sewage e.g. a lagoon or reed bed which would help to reduce the level of pollutants entering the river.

The diffuse agricultural pollution entering the river within this waterbody is contributing to the higher levels of phosphate detected here. Urbanisation in the land surrounding the river has also increased the amount of urban run-off.


Engage landowners to encourage best practises for use of phosphates.

Increase riparian buffer strips to encourage nutrients to settle out before entering the river.

Investigate the use of sustainable drainage systems (SuDS) in urban areas.

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