What effect does bacterial pollution have on lakes?

Bacterial pollution in lakes can lead to harmful algal blooms, which deplete oxygen levels and produce toxins that are detrimental to aquatic life and can pose health risks to humans. Increased bacteria levels can also disrupt the balance of the ecosystem, leading to declines in fish populations and biodiversity. Additionally, elevated bacteria levels may hinder recreational activities such as swimming and fishing, impacting local economies and community health.