TRSPA SWP Wellhead Protection Areas
Polygon file displaying Well Head Protection Areas (WHPA) in the Toronto and Region Source Protection Area (TRSPA). WHPAs are areas where water travels through the ground to a municipal well.
Entity Name: SWP Wellhead Protection Area
Table Name: SWP_WELLHEAD_PROTECTION_AREA_FT
Land area around a well where contaminants from land activities can reach and pollute the well water supply. Subdivided concentrically to show risk; scores range between 2 (lowest) and 10 (highest). In general, 8 or 10 indicate there is a policy for certain activities to prohibit or manage them. Wellhead protection areas are described as WHPA A: Area closest to the well, within a 100-metre radius. Land-based activities here pose the highest risk to well water. The vulnerability score is always 10. WHPA B: Contaminants from land-based activities in this area would take less than 2 years to travel to the well. Scores range between 6 and 10. WHPA C or C1: Contaminants would take less than 5 (C) or 10 (C1) years to travel to the well. Dense non-aqueous phase liquids (DNAPLs) continue to pose a threat here. The vulnerability scores range between 4 and 8. WHPA D: Contaminants would take up to 25 years to travel to the well. The vulnerability scores range between 2 and 6.
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ATTRIBUTE/COLUMN NAME
DATATYPE
REQ
DESCRIPTION
1
OGF ID
OBJECTID
NUMBER(13)
Yes
A unique numeric provincial identifier assigned to each object.
2
Source Protection Area ID
SPA_ID
NUMBER(2)
Yes
Identifier for the source protection area that provided the original data about the feature.
3
Wellhead Protection Area ID
WHPA_ID
NUMBER(13)
Yes
The object identifier of the feature from the original Wellhead Protection Zone dataset.
4
Area Name
AREA_NAME
VARCHAR2(2)
Yes
The name of the well head protection area or zone, as a letter code. Values usually reflect the time period for water to reach the well. Code values are described as A: 100 m radius around the well, B: up to 2 years, C: up to 5 years, C1: up to 10 years, D: up to 25 years.
VALID VALUES:
A
B
C
C1
D
5
Wellfield
VARCHAR(50)
No
Local name of water system
Datasets available for download
-
TRSPA SWP Wellhead Protection Areas (WHPA)Feature Layer
Layer 0 via ArcGIS REST API
-
TRSPA SWP Wellhead Protection Areas (WHPA) (Explore)HTML
Explore TRSPA SWP Wellhead Protection Areas (WHPA) on ArcGIS Hub
Additional Info
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| Last Updated | May 19, 2026, 16:31 (UTC) |
| Created | May 19, 2026, 16:31 (UTC) |
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Domain / Topic
Domain or topic of the dataset being cataloged.
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Title
Title for the Dataset.
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TRSPA SWP Wellhead Protection Areas |
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Description
A description of the dataset.
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Polygon file displaying Well Head Protection Areas (WHPA) in the Toronto and Region Source Protection Area (TRSPA). WHPAs are areas where water travels through the ground to a municipal well. Entity Name: SWP Wellhead Protection Area Table Name: SWP_WELLHEAD_PROTECTION_AREA_FT Land area around a well where contaminants from land activities can reach and pollute the well water supply. Subdivided concentrically to show risk; scores range between 2 (lowest) and 10 (highest). In general, 8 or 10 indicate there is a policy for certain activities to prohibit or manage them. Wellhead protection areas are described as WHPA A: Area closest to the well, within a 100-metre radius. Land-based activities here pose the highest risk to well water. The vulnerability score is always 10. WHPA B: Contaminants from land-based activities in this area would take less than 2 years to travel to the well. Scores range between 6 and 10. WHPA C or C1: Contaminants would take less than 5 (C) or 10 (C1) years to travel to the well. Dense non-aqueous phase liquids (DNAPLs) continue to pose a threat here. The vulnerability scores range between 4 and 8. WHPA D: Contaminants would take up to 25 years to travel to the well. The vulnerability scores range between 2 and 6. # ATTRIBUTE/COLUMN NAME DATATYPE REQ DESCRIPTION 1 OGF ID OBJECTID NUMBER(13) Yes A unique numeric provincial identifier assigned to each object. 2 Source Protection Area ID SPA_ID NUMBER(2) Yes Identifier for the source protection area that provided the original data about the feature. 3 Wellhead Protection Area ID WHPA_ID NUMBER(13) Yes The object identifier of the feature from the original Wellhead Protection Zone dataset. 4 Area Name AREA_NAME VARCHAR2(2) Yes The name of the well head protection area or zone, as a letter code. Values usually reflect the time period for water to reach the well. Code values are described as A: 100 m radius around the well, B: up to 2 years, C: up to 5 years, C1: up to 10 years, D: up to 25 years. VALID VALUES: A B C C1 D 5 Wellfield VARCHAR(50) No Local name of water system
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Tags / Keywords
Keywords/tags categorizing the dataset.
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Format (CSV, XLS, TXT, PDF, etc)
File format of the dataset.
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Dataset Size
Dataset size in megabytes.
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416.0 |
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Metadata Identifier
Metadata identifier – can be used as the unique identifier for catalogue entry
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Published Date
Published date of the dataset.
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2024-01-23 |
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Time Period Data Span (start date)
Start date of the data in the dataset.
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Time Period Data Span (end date)
End date of time data in the dataset.
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GeoSpatial Area Data Span
A spatial region or named place the dataset covers.
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Access category
Type of access granted for the dataset (open, closed, service, etc).
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public |
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License
License used to access the dataset.
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License not specified |
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Limits on use
Limits on use of data.
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Location
Location of the dataset.
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https://trca-camaps.opendata.arcgis.com/datasets/camaps::trspa-swp-wellhead-protection-areas |
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Data Service
Data service for accessing a dataset.
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Owner
Owner of the dataset.
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trca_d.macleod |
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Contact Point
Who to contact regarding access?
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Conservation Ontario |
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Contact Point Email
The email to contact regarding access?
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[email protected] |
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Publisher
Publisher of the dataset.
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Conservation Ontario |
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Publisher Email
Email of the publisher.
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Author
Author of the dataset.
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trca_d.macleod |
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Author Email
Email of the author.
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Accessed At
Date the data and metadata was accessed.
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2024-04-11 |
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Identifier
Unique identifier for the dataset.
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9912e24f500641ddb31bb711124399b6 |
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Language
Language(s) of the dataset
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English |
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Link to dataset description
A URL to an external document describing the dataset.
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https://trca-camaps.opendata.arcgis.com/datasets/camaps::trspa-swp-wellhead-protection-areas |
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Persistent Identifier
Data is identified by a persistent identifier.
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Globally Unique Identifier
Data is identified by a persistent and globally unique identifier.
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Contains data about individuals
Does the data hold data about individuals?
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Contains data about identifiable individuals
Does the data hold identifiable data about individual?
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Contains Indigenous Data
Does the data hold data about Indigenous communities?
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Portal Type
Platform type of the source portal.
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Version
Version of the datatset
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None |
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Source
Source of the dataset.
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None |
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Version notes
Version notes about the dataset.
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Is version of another dataset
Link to dataset that it is a version of.
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Other versions
Link to datasets that are versions of it.
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Provenance Text
Provenance Text of the data.
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Conservation Ontario |
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Provenance URL
Provenance URL of the data.
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Temporal resolution
Describes how granular the date/time data in the dataset is.
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GeoSpatial resolution in meters
Describes how granular (in meters) geospatial data is in the dataset.
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GeoSpatial resolution (in regions)
Describes how granular (in regions) geospatial data is in the dataset.
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Indigenous Community Permission
Who holds the Indigenous Community Permission. Who to contact regarding access to a dataset that has data about Indigenous communities.
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Community Permission
Community permission (who gave permission).
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The Indigenous communities the dataset is about
Indigenous communities from which data is derived.
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Number of data rows
If tabular dataset, total number of rows.
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49 |
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Number of data columns
If tabular dataset, total number of unique columns.
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10 |
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Number of data cells
If tabular dataset, total number of cells with data.
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490 |
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Number of data relations
If RDF dataset, total number of triples.
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Number of entities
If RDF dataset, total number of entities.
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Number of data properties
If RDF dataset, total number of unique properties used by the triples.
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Data quality
Describes the quality of the data in the dataset.
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Metric for data quality
A metric used to measure the quality of the data, such as missing values or invalid formats.
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