Biological water quality factors

coli
These bacteria originate from the feces of warm-blooded animals, including humans. Their presence in water indicates potential contamination with sewage or animal waste, which can carry harmful pathogens that cause diseases like cholera and dysentery.

While some algae are natural components of aquatic ecosystems, excessive growth (algal blooms) can be detrimental. Blooms, often caused by nutrient pollution, can deplete dissolved oxygen when they decompose, harming fish and other aquatic life. Some algal blooms also produce toxins.

These are non-native organisms that can outcompete native species for resources, alter habitats, and disrupt the natural balance of an aquatic ecosystem. Their presence can negatively impact biodiversity and the overall health of the water body.