303,525 datasets indexed1,419 publishers
Open Data IndexThe index of open data about the Netherlands
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Foundation or organisation

Stichting RIONED

Umbrella organisation for urban water management and sewerage. Maintains the Urban Water Data Dictionary (GWSW), through which municipalities share their sewer data.

www.rioned.nl

rioned.nl
Screenshot of rioned.nl
2datasets in our index
100%with an API or map service in the metadata
1sources explained
1examples with their data

What they publish

Counted across all indexes we harvest; modified between February 2026 and 13 February 2026.

Where it is

  • Nationaal Georegister2

Formats

API FEATURES2WFS2INSPIRE ATOM2WMS2

Subjects (per the publisher)

(civiele) structuren2

Sources explained

Municipal sewer networks (GWSW)

Stichting RIONED, met gegevens van gemeenten, via PDOKNetherlands, pipe and manhole

The sewer management data of municipalities that share it under the Urban Water Data Dictionary (GWSW) of the RIONED foundation: pipes with material, diameter and construction year, manholes, pumps, structures, house connections and discharge points such as combined sewer overflows. On 16 October 2026 it held 1.8 million pipes, 1.45 million manholes and 14,905 discharge points from 144 municipalities (out of 342), plus one dataset from the water authorities. Via PDOK as OGC API, WFS, WMS and GeoPackage.

OpenAPIMap layerDownloadHousing and landClimate and environment
Up to date
updated yesterday

Examples with their data

Sewer pipes in the GWSW by material: most PVC (683,213 pipes), then concrete and PE (polyethylene)

Housing and land · oktober 2026

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