Hardness of Danish drinking water

Map showing information about drinking water hardness (dH) at the level of water supply areas of public waterworks in Denmark based on quality-assured data, extracted from the national well-database Jupiter in September 2023. The hardness degree is based on the concentration of calcium and magnesium in the drinking water and has importance, for example, for the soap dosage when washing clothes: hard water requires more soap than soft water. Drinking water hardness may vary considerably from location to location and in time. Contact your water utility company to get the updated and precise figures.

Date (Publication): 2024-09-05

Identifier: dk.geus: / Drikkevands haardhed

Presentation form: Digital map

Purpose: The purpose of this map is to show the variation of drinking water (DW) hardness in Denmark based on the data available in 2023. DW hardness is an important technical characteristic of tap water in relation to precipitation of carbonates in water pipes, boilers and other hot water household appliances, as well as in relation to increased soap use. The data have also potential relevance to different authorities and industries.

Status: Completed

Point of contact

Geological Survey of Denmark and Greenland - Regarding inquiries

Øster Voldgade 10 , København , 1350 K , Danmark

Maintenance and update frequency: As needed

GEMET - INSPIRE themes, version 1.0

Geology
Land use

Keywords

Drinking water
Hardness

Access constraints: Copyright

Use constraints: Copyright

Other constraints: The map may be published with the consent of GEUS.

Other constraints: Conditions for re-use of data https://data.geus.dk/geusmap/terms_20140620.pdf

Spatial representation type: Vector

Denominator: 1000000

Distance: -1 m

Metadata language: dan

Topic category

Geoscientific information
Environment
Inland waters

Reference system identifier: EPSG / https://epsg.io/25832

Geometric object type: Complex

Distribution format

Web Service ( 1.3.0 )

Point of contact

Geological Survey of Denmark and Greenland (GEUS) - Bjarni Pjetursson

Øster Voldgade 10 , København , 1350 K , Danmark

OnLine resource: Denmark's Geology Portal ( WWW:LINK-1.0-http--link )
GEUS' web portal for geological maps of Denmark

OnLine resource: Download ( WWW:DOWNLOAD-1.0-http--download )
Download datasets from GEUS' Dataverse

OnLine resource: Webservice ( OGC:WMS-1.3.0-http-get-capabilities )
Web service for the dataset

Hierarchy level: Dataset

Conformance result

Date (Publication): 2024-09-05

Explanation: This field has no significance

Pass: No

Statement: The map is based on the latest available hardness information at the water supply areas of public waterworks. The public waterworks metadata and drinking water analyses of Ca, Mg and total hardness were extracted from the Jupiter database on 6 September 2023. The water supply areas are from Schullehner (2022, https://doi.org/10.34194/geusb.v49.8319 ). Data were quality assured, filtered, aggregated and linked together.