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  3. Historic UK Water Quality Sampling Harmonised Monitoring Scheme Summary Data

Historic UK Water Quality Sampling Harmonised Monitoring Scheme Summary Data

Summary

This record is for Approval for Access product AfA178.The Historic UK Water Quality Sampling Harmonised Monitoring Scheme (HMS) data contains statistics for a series of water quality sampling sites including annual means, maximum and minimum values for each Region for specified determinands from 1975 onwards. The sampling network includes 230 sites, which are mainly located at the tidal limits of major rivers or at the points of confluence of significant tributaries. The information held within the HMS includes data on: Oxygen and ammonia, Nutrients, List II metals and Pesticides. Annual mean concentrations have been calculated for each HMS site. The data show the annual averages of the site means in each region, with each site given equal weight irrespective of the number of samples taken - an average of all the samples would give a greater weight to the sites at which samples are most frequently taken. In order to give an indication of the range of values at different sites within each region, figures are also given for the maximum and minimum site mean for each region. The data also includes for the UK average, the 10th percentile and the 90th percentile of the site means for the whole of the UK. For each determinand in each year and the 10-percentile and the 90-percentile of the site means in each region. The Harmonised Monitoring Scheme (HMS) was established to provide an archive of water quality data for the UK. It is used to provide information for international obligations, including the long-term trends of some determinands and the estimation of riverborne input of selected determinands to the sea. The detailed dataset is covered in AfA255 Historic UK Water Quality Sampling Harmonised Monitoring Scheme detailed data.

Use limitation statement

There are no public access constraints to this data. Use of this data is subject to the licence identified.

Attribution statement

© Environment Agency copyright and/or database right 2015. All rights reserved

Use constraints

© Scottish Environmental Protection Agency 2013

Technical information

Update frequency

annually

Lineage

Chemical and Physico-chemical data is collected via site-specific surveys

Spatial information

Geographic extent

  • Latitude from: 49.943 to 55.816
  • Longitude from: -6.236 to 2.072
Metadata information

Language

English

Metadata identifier

652a8bb0-d465-11e4-baf0-f0def148f590


Published by

Environment Agency

Contact publisher

Defra Data Services Forum

Dataset reference dates

Creation date

01 January 1975

Revision date

N/A

Publication date

N/A

Period

  • From: 01 January 1974
  • To: 31 December 2013

Search

Data and Supporting Information
Data services and download by area of interestLinkAction
Full downloads and supporting documentationFormatAction
Historic_UK_Water_Quality_Sampling_Harmonised_Monitoring_Scheme_Summary_Data.zipZIPDownload