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A dip in the ocean, warm sun on the skin — and suddenly nature calls. Many holidaymakers know the dilemma. But is relieving oneself in the sea actually harmful to the environment? According to researchers, the answer is clear: in almost all cases, it poses virtually no ecological risk.
Why the Ocean Can Handle It
The key lies in the composition of human urine. About 95 percent of it is simply water. The remaining components — sodium, chloride, potassium — are substances already found in seawater, often in far higher concentrations. Even urea, the main organic compound in urine, is quickly diluted in the vastness of the ocean.
Scientists from the American Chemical Society conclude that urinating in the sea has no measurable environmental impact.
And humans are hardly the only contributors. Marine animals release their waste directly into the water as well. A single whale can excrete hundreds of liters of urine per day. Compared with that, the contribution of one swimmer is negligible.
The One Exception: Coral Reefs
There is, however, one important caveat. In sensitive ecosystems such as coral reefs, additional nutrients can disrupt the delicate balance. Excess nitrogen may promote algae growth, which can smother corals. In these areas, experts advise swimmers to hold back.
Why Pools Are a No-Go
The situation is very different in swimming pools. Although the amount of urine is usually small, the chemistry matters. Urea and other compounds in urine react with chlorine, forming chloramines — the substances responsible for the typical “pool smell.” These can irritate eyes, skin, and the respiratory system.
Unlike the ocean, a pool is a closed system with limited water volume. Dilution is minimal, and the chemical reactions are unavoidable. For this reason, experts strongly advise against using the pool as a toilet.
- source: krone.at/picture: pixabay.com
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