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

The presented graph illustrates the sources of

Nitrogen

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

Overall

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, it can be clearly seen that there are four

Nitrogen

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sources,

such

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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

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, fertiliser and household liquid wastes are the major contributors of

Nitrogen

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in the Domestic and Market Garden areas.

While

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those areas have more than one domain of

such

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

Nitrogen

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. 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

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