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Foam on Surface Waterbodies

Foam on Surface Waterbodies 2025

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The document explains the natural phenomenon of foam formation on lakes and streams, primarily caused by the decomposition of organic matter that releases fatty acids acting as surfactants. It discusses the sources of this organic matter, both natural (like decomposing vegetation) and anthropogenic (such as sewage and agricultural runoff). The document clarifies that while foam is generally harmless, it can accumulate contaminants. It also addresses specific instances of excessive foam in British Columbia and provides references for further reading.

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What is the foam in the water runoff?

Foams that form on the surface of stormwater ponds may be the result of illicit discharges of soap and detergents (see image on the left), or they can be formed naturally, usually in association with algae blooms. All plant cells contain natural surfactants that change water surface tension.

Is foamy water safe to drink?

If you allow a glass of water to stand for a few moments, the air bubbles will rise to the surface. This phenomenon is called entrained air and does not affect the quality of your water - it is perfectly safe to drink.

What causes foam on the lakeshore?

The foam that appears along lakeshores is most often the result of the natural die-off of aquatic plants. Plants are made up of organic material, including oils (e.g., corn oil and vegetable oil). When the plants die and decompose, the oils contained in the plant cells are released and float to the surface.

What causes foam in water treatment?

Surfactants and Detergents: Surfactants, which are commonly found in household and industrial detergents, can enter the wastewater treatment system and create foam due to their surface-active properties.

What is the foam on top of river water?

Natural suds result from the decomposition of animals and plants, which releases organic surfactants into the water. This is commonly referred to as dissolved organic carbon (DOC), which causes air bubbles, reduces the surface tension of the water, and forms mounds of dense, light-colored bubbles.

What is the white foam in water called?

Sea foam forms when dissolved organic matter in the ocean is churned up. Sea Foam at Ocean Beach in San Francisco.

What is the white foam in wastewater effluent?

Excessive amounts of surfactants in the wastewater can generate foam. A young sludge produces white, fluffy foam in the aeration basin of the treatment plant. Excessive amounts of fats, oil and grease (FOG) or some other chemicals can cause the growth of foam-forming filamentous bacteria.

Foam on Surface Waterbodies 2025

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