With warm weather drawing crowds to cooling waters, it's essential to check for blue-green algae before swimming in natural spots—for your safety and your dog's.
Summer heatwaves and staycations mean more people are flocking to seas, lakes, and ponds. These spots offer refreshing relief for humans and pets alike. However, blue-green algae poses a hidden threat, as it can produce toxins harmful to health.
Lakes and ponds are prone to blue-green algae blooms during hot summer months. These microscopic organisms thrive in freshwater, especially when temperatures exceed 20°C, winds are calm, and aquatic plants are scarce. The algae get their name from the blue tint released when cells break down.
Blue-green algae is often invisible until blooms form visible green floating layers or thick white/blue foam on the surface.
Yes, many strains are toxic. Toxins can enter the human body via swallowing water or skin contact, while dogs risk ingestion by drinking or grooming. Always verify water safety at zwemwater.nl to find approved spots for worry-free swims.
If exposed, watch for these signs, typically appearing within 12 hours:
Children are at higher risk due to accidental ingestion. Seek medical help for severe symptoms.
From May 1 to October 1, Rijkswaterstaat monitors bathing waters, with provinces sharing public updates.
Though river quality has improved, pollutants and unmonitored bacteria or algae make them unsafe. Steer clear, regardless of appearance.
Open water swimming carries risks—follow these expert tips to stay safe. What's your go-to natural swimming spot?
