The diagram below shows nitrogen sources and concentration levels in the groundwater of a coastal city.

The presented graph illustrates the sources of

Nitrogen

and its concentration levels in the groundwater of a coastal city.

Overall

, it can be clearly seen that there are four

Nitrogen

sources,

such

as Coastal Vegetation, Domestic and Market Gardens, Industrial, and Waste Disposal. Based on the concentration level, the top three origins are Industrial, Waste disposal and Domestic and Market Gardens. Focusing on Coastal Vegetation, it is evident that the substance is absorbed into the soil by two origins, including oxidation by lightning and fixation by vegetation.

On the other hand

, fertiliser and household liquid wastes are the major contributors of

Nitrogen

in the Domestic and Market Garden areas.

While

those areas have more than one domain of

such

substance, Industrial and Waste disposal areas each have only one major source of

Nitrogen

. First is the leaks from storage tanks and wastewater ponds for the industry. The next is through Landfill leakage for the disposal sector. After

Nitrogen

infiltrates the soil from those origins, it flows to the groundwater discharge zone through the saltwater interface before ending up in the ocean.