dataset · Wales
Source Protection Zones (SPZ) Merged
Source Protection Zones [Merged] have been created as public facing boundaries where individual groundwater bodies within Source Protection Zones (SPZ) have been dissolved so only the outer boundaries are shown. SPZs are defined around large and public potable groundwater abstraction sites. The purpose of SPZs is to provide additional protection to safeguard drinking water quality through constraining the proximity of an activity that may impact upon a drinking water abstraction.
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Licence: ["There are no access restrictions on this data. NRW may release, publish or disseminate it freely.", "\u00a9 CNC/NRW. Data may be re-used under the terms of the Open Government Licence providing it i
Evidence quality: 43.9
Listed in data.gov.uk public catalogue API on 2026-10-16; relevance/value screened (haiku).
Metadata checked: 2026-10-14T13:20:00.000Z
What's in it
- Data offered docs-verified
- Source Protection Zone boundaries (merged outer boundaries, groundwater bodies dissolved) · Web Mapping Service · Data & Web Services download
- Coverage docs-verified
- Wales (bounding box: lat 51.240829 to 53.513067, lon -5.777741 to -2.608865)
- Update frequency docs-verified
- as needed (asNeeded)
- Formats llm-inferred
- WMS
- Access docs-verified
- Free and open; no access restrictions. Re-use under the Open Government Licence v3.0 (© CNC/NRW).
Useful for
- Use cases llm-inferred
- Screening site investigations and development proposals against drinking water SPZ boundaries in Wales · Flagging groundwater protection constraints in drainage or infiltration strategies near public abstractions · Mapping drinking water protection areas for EIA or permit baseline reports
- Audience llm-inferred
- hydrogeologists · environmental consultants · flood and drainage engineers · planners · GIS analysts
Limitations
- Constraints llm-inferred
- Outer boundaries only: individual groundwater body SPZ detail is dissolved in the merged version · Wales coverage only · Updated as needed rather than on a fixed schedule · Download and WMS formats are not specified in the docs
Evidence
- https://datamap.gov.wales/layers/inspire-nrw:NRW_Source_Protection_Zones
- https://www.data.gov.uk/dataset/c23a9e89-8868-4842-995e-1e1923fcb84d/source-protection-zones-spz-merged2
Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.