What would happen if you put soap in a river or lake and you took a bath in it

Answer:the surface tension of the water, something that we humans may not notice, but that's crucial for critters such as water striders to get around. Lower surface tension reduces the oxygen level in the water, causing harm to fish and other aquatic wildlife. Surfactants in soaps are toxic to lake life, particularly tiny invertebrates.

if you did that then you would most likely be dirty still

Explanation:

because lake or river water is from rain and, or dirt and bacteria that soap couldn't clean if taking a bath in it because your using the same dirty water and not really washing.