River water quality, raw observations, 2013-2017

Licence

Creative Commons Attribution 4.0 International

You may use this work for commercial purposes.

You must attribute the creator in your own works.

1995
9
Added
18 Aug 2021

This dataset was first added to MfE Data Service on 18 Aug 2021.

These data are the raw river water quality observations used to calculate state and trends for the period ending 2017.

It contains ten parameters of water quality based on measurements made at monitored river sites:

  • Nitrate-nitrogen
  • Ammoniacal nitrogen
  • Ammoniacal nitrogen (adjusted)
  • Total nitrogen
  • Total phosphorus
  • Dissolved reactive phosphorus
  • Water clarity
  • Turbidity
  • Escherichia coli
  • Macroinvertebrate community index

More information on this dataset and how it relates to our environmental reporting indicators and topics can be found in the summary report available at www.mfe.govt.nz/publications/fresh-water/water-qua....

Note: This dataset has a large number of rows, which Microsoft Excel may not be able to fully open. A DBMS, statistical or GIS application is needed to view the entire dataset.

Table ID 105938
Data type Table
Row count 1198633
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

NZ Freshwater Nutrient and Biomass Measurements for Periphyton 2012 - 2020

Licence

Creative Commons Attribution 4.0 International

You may use this work for commercial purposes.

You must attribute the creator in your own works.

441
8
Added
25 May 2022

This dataset was first added to MfE Data Service on 25 May 2022.

NZ regional council freshwater nutrient and biomass measurements 2012-2020.

Used to derive nitrogen and phosphorus concentrations and exceedance criteria for managing periphyton in fresh water.

Creative Commons 4.0 International by Ministry for the Environment and Statistics New Zealand

Variables:

  • Site (the number of the data point itself)
  • RC (Regional Council that collected the measurement)
  • RCSiteID (the identifier used by that specific council)
  • SiteName (the Site where the measurement was collected)
  • DateChla (date the chlorophyll-a measurement was collected)
  • Year (Year of collection)
  • Month (Month of collection)
  • Chla ( mg chlorophyll-a per square meter)
  • NOxppb (Nitrous oxide parts per billion)
  • NH4ppb (Ammonia parts per billion)
  • DRPppb (Dissolved Reactive Phosphorus parts per billion)
  • TNppb (Total Nitrogen parts per billion)
  • TPppb (Total Phosphorus parts per billion)
  • DINppb (Dissolved Inorganic Nitrogen parts per billion)
  • EC (Electrical Conductivity)
  • pH (acidity/basicness of the water at the sample location)
  • Temp (water temperature in degrees Celsius at time of measurement)
  • Turbidity (turbidity of the water at time of measurement)
  • Clarity_m (water clarity, in metres, at the time of measurement)

N/A values in the data set refer to an absence of measurement for that specific variable.

Report:

environment.govt.nz/publications/derivation-of-nut...

Snelder T, Kilroy C, Booker D (2021) Derivation of Nutrient Criteria for Periphyton Biomass Objectives. Using regional council monitoring data. LWP and NIWA Ltd, Christchurch, New Zealand

For subject matter questions please contact freshwater@me.govt.nz.

Table ID 107868
Data type Table
Row count 20765
Services Web Feature Service (WFS), Catalog Service (CS-W)