No, you should not use biodegradable soap directly in rivers or other natural water bodies.
The Impact of Biodegradable Soap on Water
While the term "biodegradable" suggests the soap will break down naturally over time, this process still requires oxygen and can release nutrients or chemicals that disrupt the delicate balance of an aquatic ecosystem.
According to the reference provided, just because a soap is biodegradable, you shouldn't put it directly into the water, especially near public water sources. Even biodegradable soaps can:
- Affect the chemistry of water bodies: Components in the soap, such as surfactants and phosphates (though many eco-friendly soaps aim to minimize these), can alter pH levels or increase nutrient loads.
- Harm aquatic organisms: These chemical changes and nutrient increases can be toxic to fish, insects, and other life forms in the water. High nutrient levels, for instance, can lead to algal blooms, which deplete oxygen and create "dead zones."
Biodegradable soaps are designed to break down effectively in soil and septic systems, where bacteria are abundant and the wastewater is processed before potentially reaching natural water sources. Putting them directly into a river bypasses this intended breakdown process.
Safe Practices for Using Soap Outdoors Near Water
When camping or spending time near rivers, lakes, or streams, follow these best practices to minimize your environmental impact:
- Wash away from water sources: Always carry water at least 200 feet (about 70 paces) away from the water body to wash yourself, dishes, or clothing.
- Dig a cathole: After washing, scatter the soapy water over a wide area, ideally in a cathole dug away from the water source, allowing the soap to filter through soil before potentially entering groundwater.
- Use minimal soap: If you must use soap, use the smallest amount necessary.
- Consider soap-free cleaning: Sometimes, warm water and a bit of scrubbing are sufficient for cleaning dishes or personal hygiene.
- Properly dispose of greywater: Never dump soapy water directly into the river or on the riverbank.
By taking these simple precautions, you can help protect the health of our rivers and the organisms that depend on them, even when using biodegradable products.
