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 2022/23
Find out more about the work of the Chilterns Chalk Streams Project – Read our latest Annual Report.
Find out what we achieved through the Chalk Streams and Wetland Meadows Project, along with an update from the ground breaking River Chess Smarter Water Catchment Initiative.
Recent News
Position statement on sewage discharges in the Chilterns National Landscape
The Chilterns National Landscape has released a position statement expressing dismay that local communities, including Chalfont St Giles and Chalfont St Peter, are yet again suffering from raw sewage discharges flowing from overloaded sewage pipes owned and managed by Thames Water.
Ewelme Brook Catchment Plan
Check out our new Storymap collection! It sets out the catchment plan for the Ewelme Brook, one of nine major...
Events
A vision for Countryside Access in the Chess Valley
- Thursday 25th April
- 7pm
We will take a look at countryside access in the...
Riverfly training day
- 27 April 2024
- 9:30
The Chilterns Chalk Stream Project are hosting this Riverfly monitoring training day...