<span>The bacteria is likely from the sewage coming from the park's waste pipelines. The excess nitrogen would probably be from the pesticides used to control insects that the park sprayed around the outside of the pond.</span>
The bacteria are small prokaryotic organisms. A large colony of small bacteria can be found in water, air and soil. Some bacteria also grow in the digestive tract of humans and animals. The fecal discharge of animals will contain the bacteria colonies which will contaminate the pond water when drains along with the surface runoff. The nitrogen is element that is required by the plants for their appropriate growth. Usually the soils of the agriculture land lacks nitrogen. The nitrogen in the soils are added up by the fertilizers. The surface runoff will take away the fertilizers and will deposit them to the pond water. This will lead to the contamination of pond water with nitrogen.
