Name: IE_GSI_Public_Water_Supply_Source_Protection_Areas_20K_IE26_ITM

Display Field: SPA_NAME

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Public Water Supplies (PWSs) are managed by Irish Water, Ireland's national water utility, since 2013. Before this, public water supplies were managed by Local Authorities. More than 70% of public supplies take groundwater from boreholes, springs and infiltration galleries. This accounts for about 23% by volume (Irish Water, 2018).Source Protection Areas (SPAs) are areas outlined around groundwater abstraction points (e.g. borehole or spring) which provide drinking water. The aim of the SPAs is to protect groundwater by placing tighter controls on activities within all or part of the zone of contribution (ZOC) of the source. The Zone of Contribution (ZOC) is the land area that contributes water to the well or spring.Two Source Protection Areas (SPAs) are outlined. The Inner Protection Area (SI) aims to protect against the effects of human activities that might have an immediate effect on the source and, in particular, against microbial pollution. The Outer Protection Area (SO) covers the rest of the zone of contribution (ZOC) to the groundwater abstraction point.Not all groundwater-fed public supply sources have SPAs outlined around them. Most studies (more than 125) have been carried out by the Geological Survey Ireland as part of County Groundwater Protection Schemes. The Environmental Protection Agency carried out more than 40 studies as part of the national groundwater monitoring network characterisation. Further studies have been carried out by consultancies for Local Authorities and Irish Water.Different methods are used to map the entire Zone of Contribution to a spring, borehole or well, resulting in different degrees of confidence associated with the boundaries of the delineated area. To be able to specify the Inner Protection Zone within the entire Zone of Contribution, knowledge or estimates of groundwater travel time within the aquifer are needed (e.g. from site-specific hydrogeological parameters or tracer tests).Source Protection Areas have been mapped by the GSI and EPA following the ‘GSI method’ (e.g., GSI/EPA/IGI Source Protection Zonation course, 2009; Kelly, 2010; DELG/EPA/GSI, 1999). These SPAs were mapped as part of County Groundwater Protection Schemes or as part of the WFD Groundwater Monitoring network characterisation. Other SPAs have been mapped by consultants for Local Authorities/Irish Water. They have not been peer-reviewed by the GSI. The Zone of Contribution and the Source Protection Area account for the ‘horizontal’ movement of groundwater. Source Protection Zones are obtained by integrating the Source Protection Areas with the groundwater vulnerability categories. The Source Protection Zone includes the complete pathway, both vertical and horizontal, for re-charge and any entrained contaminants to the abstraction point.Whereas the aim of delineating ZOCs is to define approximate areas that contribute water to an abstraction point, the aim of SPZs is to geo-scientifically characterise the pathway and receptor elements of risk to groundwater within the ZOC of a given source (Kelly, 2010). EPA prepared an advice note on “Source Protection and Catchment Management to protect Groundwater Supplies” that outlines the key measures and policies in place in Ireland (EPA, 2011).This map shows the location of SPA's which have been mapped around public supplies of groundwater in Ireland. This map is to the scale 1:20,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 200m.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).The data is shown as polygons. Each polygon holds information on Source Protection Area such as name, code, id, data source, county, reviewed by GSI and links to online reports

Service Item Id: 93f39cadf07f4eaca522a6b984959cad

Copyright Text: Geological Survey Ireland

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 476599.6302
YMin: 545313.6088
XMax: 724715.8267
YMax: 949323.431299999
Spatial Reference: 2157  (2157)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: SPA_CODE
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: SI
  Label: SI-Inner Protection Area
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [56, 168, 0, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 0, 0, 255]
  Width: 1
• Value: SO
  Label: SO-Outer Protection Area
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [85, 255, 0, 255]
  Outline:
  Style: esriSLSSolid
  Color: [0, 0, 0, 255]
  Width: 1
Transparency: 33
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• SHAPE ( type: esriFieldTypeGeometry, alias: SHAPE )
• SPA_ID ( type: esriFieldTypeString, alias: Source Protection Area Unique ID, length: 25 )
• SPA_CODE ( type: esriFieldTypeString, alias: Source Protection Area Code, length: 10 , Coded Values: [SI: SI] , [SO: SO] )
• SPA_NAME ( type: esriFieldTypeString, alias: Source Protection Area Name (or townland), length: 150 )
• DATASOURCE ( type: esriFieldTypeString, alias: Data Source, length: 10 )
• DW_CODE ( type: esriFieldTypeString, alias: Drinking Water Code, length: 15 )
• EU_REPORT ( type: esriFieldTypeString, alias: EU Reporting, length: 20 )
• COUNTY ( type: esriFieldTypeString, alias: County, length: 20 )
• REPORT_URL ( type: esriFieldTypeString, alias: Source Protection Area Report URL, length: 254 )
• REP_CREATOR ( type: esriFieldTypeString, alias: Report Creator, length: 50 )
• ACTIVE ( type: esriFieldTypeString, alias: Active, length: 20 , Coded Values: [No: No] , [Yes: Yes] )
• GSI_REVIEW ( type: esriFieldTypeString, alias: Reviewed by GSI, length: 10 , Coded Values: [No: No] , [Yes: Yes] )
• PUBLISH ( type: esriFieldTypeString, alias: Published Online, length: 10 , Coded Values: [No: No] , [Yes: Yes] )
• REPORTDATE ( type: esriFieldTypeDate, alias: Report Date, length: 8 )
• UPDATEDATE ( type: esriFieldTypeDate, alias: Updated, length: 8 )
• UPDATED_BY ( type: esriFieldTypeString, alias: Updated By, length: 50 )
• GLOBALID ( type: esriFieldTypeGlobalID, alias: GLOBALID, length: 38 )
• SHAPE.AREA ( type: esriFieldTypeDouble, alias: SHAPE.AREA )
• SHAPE.LEN ( type: esriFieldTypeDouble, alias: SHAPE.LEN )

Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

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