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Wild Swimming
Now Closed for the Season
Following the latest water quality test on 14 September, we’ve made the decision to end wild swimming for 2026, as levels remain high following the hot, dry weather.
Thank you to everyone who joined us this year, and for your understanding when sessions have had to be cancelled. Safety first. We look forward to welcoming you back when wild swimming resumes in April 2027.
Water Testing
One of our top priorities is regularly monitoring the water quality of South Walsham Inner Broad, particularly in relation to blue-green algae (Cyanobacteria), which can sometimes appear in freshwater bodies during the warmer months.
Blue-green algae are naturally occurring organisms found in many lakes and rivers across the UK. Despite the name, they are technically a type of bacteria and while most types are harmless, some can produce toxins when in bloom. These blooms typically gather at the water’s edge or in sheltered areas, often blown in by the wind.
Importantly, not all blue-green algae are toxic, and the presence of algae does not always indicate a risk. Human health concerns are primarily linked to high concentrations of specific toxic strains, particularly during bloom events.
We always advise the following precautions:
Avoid swimming near the banks or edges of the Broad, where algae tends to accumulate.
Do not allow dogs or children to drink or paddle in shallow, stagnant water.
Always follow on-site signage and any instructions from staff.
We recommend that all swimmers and watersports users review the latest water quality reports and make their own informed decisions about whether to enter the water. Each individual should assess their own level of risk and comfort before taking part in any activities.
Here is a list of Algae Species found in our waters and the risk levels explained.
Monitoring & Safety Standards
We follow guidance set by the World Health Organization (WHO), which recommends that recreational waters should remain open for swimming and other water-based activities as long as blue-green algae levels stay below 100,000 cells per millilitre. You can read more about the WHO’s guidance on safe recreational water use here: WHO Guidelines on Recreational Water Quality
To meet this standard and provide transparency, we have a regular water testing regime in place throughout the season. Water samples are collected and sent to an accredited laboratory for analysis.
This allows us to:
Monitor for the presence and concentration of blue-green algae.
Track seasonal trends and respond quickly if levels change.
Make informed decisions about safety and whether swimming or water access should be temporarily paused.
Recent Test Results
We carry out regular water quality testing from May to September each year, when conditions are most likely to change due to warmer temperatures, increased rainfall, and higher levels of visitor activity. We continue to monitor the water closely and will update visitors immediately if any risks are identified. Please check our social media channels and inboxes regularly for the latest news and updates.
Download our most recent water quality certificate here:
Your Safety Matters
We recommend that all swimmers and watersports users review the latest water quality reports and make their own informed decisions about whether to enter the water. Each individual should assess their own level of risk and comfort before taking part in any activities.
Please note: In the event that any water test exceeds the acceptable WHO threshold, we will immediately suspend all swimming and in-water activity until levels return to a safe standard. We reserve the right to take necessary action to protect visitor safety, including ending or restricting activities as required.
If you have any questions about current conditions or would like more details about our water testing programme, please don’t hesitate to contact us or speak to a member of our team during your visit.