Bristol Avon WaterBlitz


The Bristol Avon WaterBlitz is an annual event to collect as many water quality samples as possible from across the Bristol Avon Catchment. The project is helping to gain an invaluable snapshot of the health of our rivers that will help to direct future conservation efforts. Click here to view the data collected during our WaterBlitz events and email to find out more.


Next Event

Land Yeo WaterBlitz 2021

Friday, 7 May 2021 (All day) to Monday, 10 May 2021 (All day)

Help Bristol Avon Rivers Trust and Avon Wildlife Trust gain a snapshot of water quality in the Land Yeo catchment. The citizen science event needs river guardians to collect samples from their local watercourse to help monitor the health of our rivers and streams.

The Land Yeo rises on Dundry Hill near Barrow Gurney Reservoirs and flows through various villages to Clevedon where it exits into the Bristol Channel. The target catchment also takes in the Middle Yeo and the network of ditches and rhynes where we would like to collect data on water quality. Click here for a map of the catchment.

Register here to receive a free water testing kit (one required per sample site) which will be sent to your registered address. Alternatively you can collect your testing kit on Saturday 8th May from Moorend Spout Nature Reserve, Nailsea. BART will be here from 10am - 2pm where they will demonstrate how to take a water sample and provide further information on the project. If you would like to collect your kit in person please enter "Moorend Spout, Nailsea, BS48 2NN" in the address field. We will follow up with an email on how to find us.

Please only request the number of kits you will use. We have a limited number and do not wish any to go to waste.



Usernamesort descending Total Points
aimee_itfc 20
aitkenla1 40
alcarrington 121
alecrichardson2010 120




BART are asking individuals and community groups to take part in the Land Yeo WaterBlitz and help to collect as many water quality samples from the Land Yeo, Middle Yeo and the network of ditches and rhynes across the catchment.

Volunteers will use simple tests to determine the concentration of phosphates and nitrates in the water. In high concentrations nutrients can impact the local wildlife which depends on a healthy river. The presence of nutrients may indicate a pollution event nearby or ongoing issues from land management, sewage outfalls or urban areas.

George Clark, BART Project Officer, said: “Rivers and streams are the arteries of our planet but they face serious challenges. Within the Land Yeo catchment we often see nutrient pollution entering watercourses and degrading these important ecosystems and impacting the species that inhabit them. Therefore it is increasingly important to carry out monitoring and work together for rivers.”

“The WaterBlitz is a great opportunity to get back outside after months of lockdown and connect with your favourite local river or newly discovered stream. Volunteers can take an active, and socially distant role in scientific monitoring, helping us understand the water quality issues in our communities and to help protect our precious rivers.”

With the free, easy-to-use water testing kit, volunteers can sample their chosen watercourse in the catchment and submit their data to the Earthwatch database where nutrient levels can be compared on an interactive results map.

“BART would love to see how individuals, families and community groups are getting involved by sharing photos or videos of them out by their chosen watercourse using #LandYeoWaterBlitz across social media,” added George.

To sign up as a monitor, volunteers should register online and either request a kit to be sent or collect their kit in person on Saturday 8th May.

Please contact with any questions.


How do I get my kit?
We provide a free water testing kit. This will be posted to the address that you provided on your registration form.

I cannot log in to the website
When you registered we sent you an email with the subject "FreshWater Watch: Account Details". This email contains your log in information. If you enter an incorrect username or password several times the system will block your account. Please contact us if you have any problems.

Help, I have forgotten my password
Click here to reset your password.

Do I have to use the FreshWater Watch app?
The app helps simplify some parts of the sampling such as recording geolocation, but volunteers are welcome to use a datasheet and then enter the information on the website if they prefer. Links to the app and datasheet are available on your profile page. If using a datasheet, don't forget to log in to the website to upload your results when you return home.

How do I use the FreshWater Watch app?
Visit the app store on your mobile device (android and iOS) to search for and install the FreshWater Watch app. Log in by entering the same username and password that you use for the website. The welcome screen will display clear options to create or view a record. If you have any problems, try deleting and reinstalling the app on your mobile device.