Groundwater quality indicators include E.coli, nitrate-nitrogen, ammoniacal nitrogen, and dissolved reactive phosphorus. Also included is data on pesticides, iron, manganese, electrical conductivity, and total dissolved solids. Information on sampling protocol, equipment, and method is provided.
Nitrogen occurs naturally in groundwater, but usually at very low concentrations. Agricultural and urban land use can add more nitrate-nitrogen to groundwater. If used for drinking water, high levels of nitrogen in groundwater can affect human health and the quality of surrounding rivers and lakes. Ammoniacal nitrogen is undesirable if groundwater is used for drinking, and elevated levels of nitrate and ammoniacal nitrogen can be toxic to fish and other animals. Surplus phosphorus drains (leaches) into groundwater as dissolved reactive phosphorus. It can also be present naturally from interactions between groundwater and rocks. Too much phosphorus can lead to excessive plant and algae growth where groundwater flows into surface water. E.coli in fresh water can indicate the presence of pathogens (disease-causing organisms) from animal or human faeces. The pathogens can cause illness for anyone who ingests them.
This dataset relates to trends in four groundwater quality indicators: nitrate nitrogen, ammoniacal nitrogen, dissolved reactive phosphorus, and E.coli. throughout New Zealand over the 10-year period 2005–2014.
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|1.||Data quality for Trends in groundwater quality 2005 2014||297 KB||
|Category||Environmental Reporting > Freshwater > Groundwater quality|
|Tags||Our Fresh Water 2017|
|Columns||Variable, feature_id, trend, pvalue, median|
|Services||Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed|
|Added||25 Apr 2017|
|Last updated||25 Apr 2017|
|Revisions||4 - Browse all revisions|
|Current revision||Imported on April 25, 2017 from CSV .|