Do not urinate in swimming water

Urinating in open water is often seen as harmless, but urine contains substances that can pollute the water. Here’s a summary: 

Urine acts as a fertilizer

Urine contains nitrogen and phosphorus, among other substances. These substances:

• promote the growth of algae;
• can, if present in excess, lead to algal blooms and duckweed growth;
• make the water murky and less appealing for swimming.

Disruptions to the natural ecosystem

Drinking a few sips won’t produce the described effects immediately, but it does alter the balance of nutrients in the water:

• fast-growing algae are taking over;
• vulnerable aquatic plants and animal species are disappearing;
• Biodiversity is declining.

Hygiene and Health

Urine usually does not contain bacteria, but it is not always completely sterile.

• In people with a urinary tract infection, germs can get into the water.
• This can lead to a decline in the hygienic quality of the swimming water.
• This could lead to designated swimming areas being closed more quickly when water quality is tested.

What can you do yourself?

• Go to the bathroom before you go swimming.
• Always have young children wear a swim diaper.
• Explain to children why urinating in the water is bad for nature and other swimmers.

By keeping the above points in mind, you’re helping to keep our waters clean and our ecosystem healthy. What more could you ask for?