Invasive non-native species

INNS are plants and animals that have been brought into this country from other parts of the world and cause harm to our native species and habitats.

What problems do INNS cause?

Examples of INNS at our sites

Signal crayfish can be found at Sutton Bingham Reservoir, Monkswood Reservoir, Clatworthy Reservoir and Ellingham Lake.

Zebra mussels can be seen at Tucking Mill Reservoir, and New Zealand pigmyweed has been spotted at Blashford Lakes.

Himalayan balsam is widely spread across the region and is present at a number of our sites.

See a full list of the INNS identified at our sites.

Giant Hogweed
Non-native species: Giant hogweed
Zebra mussels
Non-native species: Zebra mussels
Signal Crayfish
Non-native species: Signal crayfish
Floating Pennywort
Non-native species: Floating pennywort

How to stop the spread of INNS at our sites

Check your clothes and shoes after walking near a reservoir and remove any seeds or fragments of plants before you leave. If a site has boot cleaning stations, carefully clean your footwear’s tread

If you take part in sailing, fishing, or any other water-based activity, you should:

  • check your equipment and clothing for plant fragments – particularly anything that is damp or hard to inspect
  • clean and wash all equipment and waders thoroughly, using hot water where possible
  • dry your equipment completely before using it again.

What we’re doing to control the spread of INNS

Biosecurity implementation at reservoirs
We are installing wash-down facilities so that sailing clubs can wash their boats and new dip tanks for anglers. We will also provide new boot scrub stations and signage, while also performing annual surveys to monitor INNS.

Partnership working
We are funding a Centre for Agriculture and Bioscience International (CABI) biological control trial, which involves infecting New Zealand pigmyweed to restrict its growth. These trials are underway at Blashford Lakes.

Contributing to a national campaign
We’re involved in a partnership formed between the government, environmental organisations, and other water companies to help reduce the threat of INNS and improve aquatic biosecurity. This partnership is led by the Animal and Plant Health Agency.

Find out more about INNS and how to identify them, as well as how to stop them from spreading when angling, sailing and canoeing.

What to do if you spot an INNS

If you think you have spotted an INNS at one of our sites, please let us know.


Report an INNS