A smiling person in glasses and a blue sweatshirt kneels by a riverbank, holding water testing kit consisting of a colour chart and test tube. They are wearing green gloves. Lush greenery and water form the background on a sunny day.

Quote on a blue background states: "A huge thank you to YOU, our citizen scientists, who collected vital data on freshwater health in 2025. Our global community is growing fast. 40 new FreshWater Watch groups popped up across the UK, Ireland, Germany, Italy, Ethiopia, Kenya and New Zealand this year. Our bi-annual Great UK WaterBlitz has become the UK's biggest freshwater citizen science campaign. We hope you join us again in April 2026!” Dr Sasha Woods, Director of Science & Impact

Our Director of Science & Impact, Dr Sasha Woods, shares her 2025 freshwater highlights... ✨

💧 #FreshWaterWatch is our global movement of volunteer citizen scientists who test the water quality of their local rivers, lakes, ponds and streams. Discover more 🔗 https://pulse.ly/bwmd62jf2w

Thanks for being part of our global #FreshWaterWatch network - the data your citizen scientists collect with our water testing kits can be used to build a better freshwater future! 💙

💧 It's #WorldRiversDay!

A huge thank you to all the #FreshWaterWatch citizen scientists across the globe!

🌍 Learn more about a couple of the groups we work with 👇
East Anglia Youth Rowing: https://pulse.ly/6ei6g8zczs
Zambia's citizen scientists: https://pulse.ly/ikevwj2thu

💧🧪 Today is #WorldWaterMonitoringDay! Thank you to all the wonderful citizen scientists across the 🌍 who are collecting valuable data using our #FreshWaterWatch water testing kit.

Discover more 🔗 earthwatch.org.uk/freshwater/

🎞️ Video by Anna Steele-Perkins

A young person in a scouting uniform, with a blue neckerchief and scout badges, is focused on taking a water sample. They are holding a small sample cup and a test tube. The background features a grassy area, trees, and buildings. Text on the image reads, "You fight for a healthy freshwater future...".

A blue background with white text: “The results showed high nitrate levels in water, indicating poor quality. They feel proud of contributing data to improve river water.” Credit is given to Frances Roundtree & 9th Grantham Scouts, Great UK WaterBlitz participants.

Thank you to our #FreshWaterWatch community groups and #GreatUKWaterBlitz participants who test their local rivers, lakes, ponds and streams, collecting valuable data which helps us build a picture of freshwater health across the UK! 💧💙 #VolunteersWeek

Just tested river water in Cricklade as part of the #GreatUKWaterBlitz with Earthwatch 💧

The results are clear: our rivers in the South Cotswolds aren't in good enough condition.

We need urgent action to stop sewage dumping and protect our waterways. #FreshWaterWatch #StopTheSewage

11 Guides and a young leader lined up facing the river in Callander, photographed from behind. Most are wearing blue hoodies with red trim

Three girls standing round a piece of card with different shades of pink on it, one with gloves on holding a small plastic test tube with liquid in it, which hasn’t changed colour to any of the pink shades

#GreatUKWaterBlitz
#FreshWaterWatch
@girlguidingscot.bsky.social

1st Callander Guides had a ball tonight taking samples and testing them for nitrates and phosphates to see how polluted the rivers are. We were pleased they weren’t - so I’m not pulling the plug on their canoeing and paddleboarding!

I took part in Earthwatch Europe’s #GreatUKWaterBlitz yesterday, sampling water at Christchurch Harbour.

Nitrate: 2.0, Phosphate: 0.2 — still a way to go for cleaner waters.

#FreshWaterWatch

Close-up shot of a hand holding a blue FreshWater Watch flyer and a water testing kit consisting of two small test tubes and a colour chart indicating nitrate and phosphate levels. The background consists of a reflective water surface, tall grasses, trees, and rolling hills under a cloudy sky.

💧Due to high demand, sign-ups for the #GreatUKWaterBlitz in April are now closed! But you can still make a difference:

💙 Make a donation
💙 Get an early access notification for the next WaterBlitz
💙 Explore other ways to join #FreshWaterWatch

Discover more 👉 earthwatch.org.uk/greatukwater...

New paper led by PNL's Izzy Bishop! Citizen scientists- plus PNL's MSc Ecology and Data Science students- are assessing water quality worldwide through #FreshWaterWatch protocols. Check out the results of 30,000+ monitoring events here: doi.org/10.5334/cstp... Spoiler: Europe doesn’t perform well!

My water testing kit for #Earthwatch #Freshwaterwatch along the littered banks of the #Hogsmillriver

Hogsmill river below the sewage works outfall #earthwatch #freshwaterwatch #waterblitz