Name: Estimated OWMS by district (TA)

Display Field: TA_name

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: OWMS counts were derived from Environment Canterbury resource consents records and the mapping of estimated OWMS using a method described in the Journal of Hydrology New Zealand. PHF Science estimated Total Nitrogen and Total Phosphorus loading from OWMS discharges in each District. Further details are documented in the PHF Science Report "report "Estimating onsite wastewater densities and their associated Total Nitrogen and Total Phosphorus mass loading rates across Waitaha Canterbury" by Qui and Humphries, February 2026.

Copyright Text: PHF Science (formerly ESR)

Default Visibility: false

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 1.0E7

Max Scale: 0.0

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: 1323818.0269
YMin: 4950306.2077
XMax: 1688162.0909000002
YMax: 5360240.0554
Spatial Reference: 2193  (2193)  LatestVCSWkid(0)

Drawing Info:

Renderer:
Class Breaks Renderer:
Field: Sum_OWMS
Min. Value: 416.0
ClassBreakInfos:
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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
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
Supports Time Relation: true
Supports Sql Format: false
Supports Query Analytic: true
Supports Query With Current User: true

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• TA_code ( type: esriFieldTypeString, alias: Territorial Authority code, length: 3 )
• TA_name ( type: esriFieldTypeString, alias: Territorial Authority name, length: 254 )
• AREA_SQ_KM ( type: esriFieldTypeDouble, alias: Area (km2) )
• Estimated_OWMS ( type: esriFieldTypeSmallInteger, alias: Estimated OWMS )
• Consented_OWMS ( type: esriFieldTypeSmallInteger, alias: Consented OWMS )
• Sum_OWMS ( type: esriFieldTypeSmallInteger, alias: Sum OWMS )
• Shape.STArea() ( type: esriFieldTypeDouble, alias: Shape__Area )
• Shape.STLength() ( type: esriFieldTypeDouble, alias: Shape__Length )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• SUM_TP_loading_per_year_kg ( type: esriFieldTypeDouble, alias: SUM TP loading (kg/year) )
• SUM_TN_loading_per_year_kg ( type: esriFieldTypeDouble, alias: SUM TN loading (kg/year) )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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