If the detergent enters in ...

If the detergent enters in the fresh water ecosystem

1. it will have a very poisonous effect on the aquatic life.
2.  if the amount of detergent is above the minimum limit. Following water habitats will die

(I)            mucus layers die and cause fish from bacteria

(II)          Parasites

3.    At 15 ppm fish will die. Most fish will die

4.    Foam of the detergent can cause Oxygen level reduced.

5.     At high PH aquatic life will be destroyed.

6.Detergents, forming foams, decrease the oxygenation of the water. Their surfactant properties allow them to dissolve toxic molecules and thus ensure their dissemination in aquatic environments. Like pesticides called hormone-mimics (endocrine disruptors), some detergents are strongly suspected of interfering with the metabolism of animals, especially amphibians (Anura, Urodela), fish and humans. They could cause sex changes in molluscs and fish, the drastic decline of frog populations and the decline of human spermatogenesi.

Remedies

You can add acid (like citric or oxalic) to neutralize the water( PH-7)

Regards

Prem Baboo