Gearing Up for Open Water: The Full Safety Picture
If you’ve recently fallen down the rabbit hole of open-water swimming kit, you’ll know how easy it is to focus on the fun stuff — wetsuits, tow floats, brightly coloured swim caps. And earplugs? Absolutely worth thinking about. Swimmer’s ear is a genuine nuisance, and anyone who spends serious time in lakes, rivers, and reservoirs will tell you that protecting your ears makes a real difference to comfort and long-term ear health.
But here’s the thing: earplugs are just one piece of the puzzle. When it comes to wild swimming safety, there’s a broader picture that deserves just as much attention — and one aspect that’s often overlooked entirely is the quality of the water you’re swimming in.
What Earplugs Actually Protect You From
Swimming earplugs work by keeping water out of the ear canal, which helps prevent otitis externa — commonly known as swimmer’s ear — an infection caused by moisture creating a warm, damp environment where bacteria thrive. For open-water swimmers specifically, this matters more than it might in a chlorinated pool, where the water is treated to reduce microbial load.
In natural water bodies, you’re exposed to a much more complex microbial environment. Earplugs reduce the risk of water entering the ear canal, but they don’t do anything about what happens when you accidentally swallow a mouthful mid-stroke, or when water splashes across your face. That’s where the quality of the water itself becomes critical.
The Risk Beneath the Surface
Wild swimming in the UK has never been more popular, and for good reason — our rivers, lakes, and coastlines offer genuinely spectacular experiences. But natural water bodies can harbour a range of pathogens and pollutants that pose real health risks to swimmers.
Bacteria and Pathogens
E. coli and enterococci bacteria — often indicators of sewage contamination — can cause stomach upsets, ear infections, and more serious illness if levels are high enough. Agricultural runoff, combined sewer overflows, and heavy rainfall can all send bacterial counts soaring in otherwise beautiful-looking water.
Blue-Green Algae
Cyanobacteria, often called blue-green algae, produces toxins that can cause skin rashes, gastrointestinal illness, and in severe cases, damage to the liver and nervous system. It’s notoriously difficult to spot with the naked eye and can bloom rapidly during warm weather.
Chemical Contamination
Fertilisers, pesticides, and industrial pollutants can leach into waterways, especially after heavy rain. While visible signs like foam or discolouration can be warning signals, many contaminants are completely invisible.
Why You Shouldn’t Rely on Looks Alone
One of the most common misconceptions in wild swimming is that clear, flowing water is clean water. It’s simply not true. Some of the most contaminated water events follow heavy rainfall, when runoff washes pollutants into rivers and lakes — even ones that looked pristine the day before.
Official water quality designations from the Environment Agency or Natural England are useful, but they’re based on historical averages and aren’t updated in real time. Conditions can change dramatically within 24 to 48 hours of a rainfall event. That’s a significant gap in knowledge for anyone planning a swim.
Taking Testing Into Your Own Hands
This is exactly why more and more wild swimmers are choosing to test the water before they get in. It’s not about being overly cautious — it’s about being informed. Just as you’d check the weather forecast before heading out for a long run, checking water quality gives you the information you need to make a sensible decision.
Home water quality test kits have become increasingly accessible and straightforward to use. Within a short time, you can get a clear picture of bacterial levels at your chosen swim spot — right now, on the day you’re planning to swim. That kind of real-time data is something no general bathing water rating can give you.
It’s also genuinely empowering. Wild swimmers who test regularly start to understand patterns — how their local river responds to rain, which spots hold up better after storms, and when it’s safest to take the plunge. That knowledge builds over time and makes you a more confident, better-informed swimmer.
Build Your Full Safety Kit
So by all means, invest in a good pair of earplugs — your ears will thank you. But think of them as one layer of protection within a broader approach to wild swimming safety. Your complete kit should include:
- Earplugs — to protect against swimmer’s ear
- A tow float — for visibility and safety in busy water
- A brightly coloured swim cap — so you’re easily spotted
- A swim buddy or group — never swim alone in open water
- Water quality test kits — so you know what you’re swimming in
That last item is something we feel passionately about here at Wild Swimming Tests. Every swimmer deserves to make an informed choice about where and when they swim.
Ready to Test Before You Swim?
If you’d like to start testing the water at your favourite wild swimming spots, we’ve got everything you need. Our test kits are designed specifically for open-water swimmers — easy to use, reliable, and built around the conditions you’ll actually encounter in UK waterways.
Head over to our shop at wildswimmingtests.co.uk to browse our range and find the right kit for your swimming adventures. Because the best wild swim is a safe one.
📷 Photo by conor rabbett on Unsplash
