Chalk streams are a characteristic and attractive feature of the Chilterns landscape. They are also a globally rare habitat. In fact there are only 283 chalk streams in the UK, and the UK accounts for around 85% of the global total.
Chalk streams are important habitats for wildlife and support a massive range of species. They are home to some of our most threatened plants and animals, such as the water vole and brown trout. They also have a fascinating history and supported many thriving industries in the past.
Our three films provide an excellent overview, explaining ‘What are chalk streams, and why are they special‘, How chalk streams work, and exploring the threats they face.
The nine Chilterns’ chalk streams are so important that a special partnership project has been created to conserve them. Uniting all the organisations with an interest in the streams, the Chilterns Chalk Streams Project works with local people across the Chilterns to improve river habitats, improve access and enjoyment and promote the sustainable use of water.
Find out more
Visit
There are plenty of ways to get out and enjoy the Chilterns chalk streams for yourself.
Discover
What is a chalk stream, how do they work, and what makes them so special?
Learning
School visit information and educational chalk stream resources for primary, secondary and beyond.
Chalk Streams in Crisis
Despite the rarity and value of chalk streams, these precious and unique freshwater ecosystems are at risk.
Our Work
For 25 years the Chilterns Chalk Streams Project has worked to conserve, enhance and raise awareness of this globally important habitat.
Get involved
If you love your local chalk stream then why not help look after it?
Chilterns Chalk Streams Project Annual Report
Read our latest Annual Report to find out more about the work of the Chilterns Chalk Streams Project.
Recent News
Notice of planned works to the River Chess at Chesham Moor
Exciting planned river restoration works at Chesham Moor will temporarily reduce access to the area this autumn/winter. Information about a...
Chilterns National Landscape secures funding to develop ‘Not Bourne Yesterday’
The Chilterns National Landscape has received a £350k grant from The National Lottery Heritage Fund for Not Bourne Yesterday: Chalk...
Welcome to the summer edition of the Chilterns Chalk Streams Project newsletter
Dear Friends, Welcome to the summer edition of the Chilterns Chalk Streams Project newsletter. This year promises to be the...
Events
Chess Citizen Science Stakeholder Event
- Mon 30th September
- 9.45am
We’re organising this event in the fifth year of the...
Riverfly Open Day 2024
- Saturday 5th October
- 12pm
The Chilterns Chalk Stream Project and Herts & Middlesex Wildlife Trust...