Urban water quality indicators include heavy metals, nutrients, and E.coli. The concentrations of these indicators are compared to the proportion of urban land cover in catchments.
Zinc and copper are heavy metals that can accumulate in sediments, shellfish, and other aquatic organisms. Metals can reach toxic levels in organisms making them unsafe to eat and can be toxic to aquatic life. Nitrogen and phosphorus are nutrients that can cause excessive algal growth. Ammonical nitrogen and nitrate-nitrogen can be toxic to aquatic life if concentrations in streams are high enough. E.coli is an indicator of disease-causing organisms, which may affect human health and recreational values in streams.
File contains trend analyses by site for water quality indicators in Auckland, Wellington, and Christchurch over the period 2008–15.
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|1.||Data quality for Urban stream water quality trends||299 KB||
|Category||Environmental Reporting > Freshwater > River water quality|
|Tags||Our Fresh Water 2017|
|Columns||field_1, sID, npID, Median, n, tau, sl, S, D, varS, Z, p, MedianAnnualSenSlope, Lci, Uci, PropObs, Frequency, City, colcode, Urban_Landcover|
|Services||Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed|
|Added||24 Apr 2017|
|Last updated||24 Apr 2017|
|Revisions||5 - Browse all revisions|
|Current revision||Imported on April 25, 2017 from CSV .|