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The CLEAN Afon Nyfer project (Catchment Level Environmental Action Network) has worked with local people to monitor water quality and invasive species, then come together to learn more and discuss the issues.


We have published our baseline data in 2 reports and are starting to understand which areas are most heavily impacted.  

We have funding in place to extend the water quality monitoring into summer 2023 and to deliver a series of events offering everyone a chance to get involved and learn more.

The Afon Nyfer (River Nevern) is a river of refuge for wildlife; linking the open habitats of the Preselis and the temperate rainforest of North Pembrokeshire with a marine conservation area. It is a catchment which tragically follows the trend across Britain, of declining biodiversity due to pollution and disruption of natural processes. However, it is not as badly affected as many other rivers and offers an opportunity to demonstrate how to halt and reverse that trend, before it is too late!

If you are keen to know more about this project, or are interested about how you could be involved, contact Adam. 


18 July 2023

On the 18th July 2023, we welcomed together a panel of experts to discuss the health of the River Nevern. See below the power point presentations from each members of the panel. 


Blog posts from the CLEAN Project

Some suggested links to websites worth checking out:

Dwr Cymru Combined Storm Overflows Explanation of CSOs and duration of sewage dumping into the rivers.


The Rivers Trust Raw Sewage In Our Rivers Explanation of raw sewage and further links.


River Action UK Charter For Rivers and other campaigning and lobbying.


Fresh Water Watch citizen science to monitor water quality.


Farming Connect riparian buffers on farms.


Save The Tefi links and resources from an adjacent catchment. 



Project Officer

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Mae'r prosiect hwn wedi derbyn cyllid drwy'r 'Grant Gwella Sir Benfro'.

This project has received funding through the 'Enhancing Pembrokeshire Grant'. 

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