Source Protection Information Atlas

Learn about the importance of protecting the sources of our drinking water.

The Source Protection Information Atlas enables anyone to determine if an address is within a Source Protection Vulnerable Area. The map displays over 20 layers of Source Protection data for Ontario. The map uses a ESRI_GEOCORTEX API (Application Programming Interface). There are 4 vulnerable area types that surround municipal water supplies: Wellhead Protection Areas, Intake Protection Zones, Significant Groundwater Recharge Areas and Highly Vulnerable Aquifers. For details on the assessment reports and plans that contain definitions of these zones please click on one of these links. For access to the raw data contact the Conservation Authority for the jurisdiction you are interested in.


Additional Documentation

The layers displayed on the map are:

  • Source Protection Area (SPA) area boundaries
  • Municipal Boundaries (Upper and Lower Tier)
  • Lots and Concession Boundaries
  • Intake Protection Zones (IPZ 1, 2 and 3)
  • Event Based Areas and related Event Type
  • Surface Water Vulnerability Scores (range of 0.1 to 10)
  • Wellhead Protection Areas (A, B, C, D, E (GUDI))
  • Groundwater Vulnerability Scores (2,4,6,8,10)
  • WHPA E (GUDI) vulnerability scores
  • Issue Contributing Areas and their related contaminant (issue)
  • Significant Groundwater Recharge Areas (SGRA) and scores (2,4 6)
  • Highly Vulnerable Aquifers (HVA)
  • Niagara Escarpment Development Control Area
  • Oak Ridges Moraine Plan Boundary
  • Satellite Imagery
  • ESRI – Topographic/road Map

Under the source protection program, 19 source protection committees worked with conservation authorities and municipalities across Ontario to assess the vulnerability of sources of municipal drinking water. These assessments were documented in 38 local assessment reports that were approved by the ministry. The data collected from these reports form the foundation for the Source Water Protection Mapping Tool.

This interactive map allows you to search for a location in Ontario and determine if it is in a Source Protection vulnerable area. The map will show the location information, vulnerable zone type and score, as well as provide link(s) to local source protection plans where you can find the policies associated with the search location.

Searches can be performed by street address, geographic coordinates or several other search options listed in the help. Confirm the location by using the satellite imagery. Please note that searches by geographic coordinates (Lat. and Long) will return the most accurate results. Searches performed with a street address, postal code, municipality, lot, concession or township may require you to further refine the location by moving the pin to the accurate location based on your knowledge of the site. Please refer to the help (Primary Navigation Pane) for tips on searching, and the proper syntax of your searches.

Questions? If you have any questions on how to use the map, or are unable to find a location, contact the Source Protection Program by email at [email protected].

For more information about the Source Protection program see our web site at Source Protection.

For additional information about your local source protection plan contact your Conservation Authority: Source Protection Plans and Resources.

Status
On going: Data is continually being updated

Maintenance and Update Frequency
Not stated

Contact
Derek Hatfield, Information Management Lead/Coordinator, Conservation Source Protection Branch, Ministry of the Environment, Conservation, and Parks, [email protected]

Datasets available for download

This dataset has no data

Additional Info

Field Value
Last Updated March 24, 2026, 20:43 (UTC)
Created March 24, 2026, 20:43 (UTC)
Domain / Topic
Domain or topic of the dataset being cataloged.
Title
Title for the Dataset.
Source Protection Information Atlas
Description
A description of the dataset.

Learn about the importance of protecting the sources of our drinking water.

The Source Protection Information Atlas enables anyone to determine if an address is within a Source Protection Vulnerable Area. The map displays over 20 layers of Source Protection data for Ontario. The map uses a ESRI_GEOCORTEX API (Application Programming Interface). There are 4 vulnerable area types that surround municipal water supplies: Wellhead Protection Areas, Intake Protection Zones, Significant Groundwater Recharge Areas and Highly Vulnerable Aquifers. For details on the assessment reports and plans that contain definitions of these zones please click on one of these links. For access to the raw data contact the Conservation Authority for the jurisdiction you are interested in.


Additional Documentation

The layers displayed on the map are:

  • Source Protection Area (SPA) area boundaries
  • Municipal Boundaries (Upper and Lower Tier)
  • Lots and Concession Boundaries
  • Intake Protection Zones (IPZ 1, 2 and 3)
  • Event Based Areas and related Event Type
  • Surface Water Vulnerability Scores (range of 0.1 to 10)
  • Wellhead Protection Areas (A, B, C, D, E (GUDI))
  • Groundwater Vulnerability Scores (2,4,6,8,10)
  • WHPA E (GUDI) vulnerability scores
  • Issue Contributing Areas and their related contaminant (issue)
  • Significant Groundwater Recharge Areas (SGRA) and scores (2,4 6)
  • Highly Vulnerable Aquifers (HVA)
  • Niagara Escarpment Development Control Area
  • Oak Ridges Moraine Plan Boundary
  • Satellite Imagery
  • ESRI – Topographic/road Map

Under the source protection program, 19 source protection committees worked with conservation authorities and municipalities across Ontario to assess the vulnerability of sources of municipal drinking water. These assessments were documented in 38 local assessment reports that were approved by the ministry. The data collected from these reports form the foundation for the Source Water Protection Mapping Tool.

This interactive map allows you to search for a location in Ontario and determine if it is in a Source Protection vulnerable area. The map will show the location information, vulnerable zone type and score, as well as provide link(s) to local source protection plans where you can find the policies associated with the search location.

Searches can be performed by street address, geographic coordinates or several other search options listed in the help. Confirm the location by using the satellite imagery. Please note that searches by geographic coordinates (Lat. and Long) will return the most accurate results. Searches performed with a street address, postal code, municipality, lot, concession or township may require you to further refine the location by moving the pin to the accurate location based on your knowledge of the site. Please refer to the help (Primary Navigation Pane) for tips on searching, and the proper syntax of your searches.

Questions? If you have any questions on how to use the map, or are unable to find a location, contact the Source Protection Program by email at [email protected].

For more information about the Source Protection program see our web site at Source Protection.

For additional information about your local source protection plan contact your Conservation Authority: Source Protection Plans and Resources.

Status
On going: Data is continually being updated

Maintenance and Update Frequency
Not stated

Contact
Derek Hatfield, Information Management Lead/Coordinator, Conservation Source Protection Branch, Ministry of the Environment, Conservation, and Parks, [email protected]

Tags / Keywords
Keywords/tags categorizing the dataset.
Format (CSV, XLS, TXT, PDF, etc)
File format of the dataset.
Dataset Size
Dataset size in megabytes.
0.0
Metadata Identifier
Metadata identifier – can be used as the unique identifier for catalogue entry
8bca644d-49a9-4597-baf1-964785988145
Published Date
Published date of the dataset.
2018-10-03
Time Period Data Span (start date)
Start date of the data in the dataset.
Time Period Data Span (end date)
End date of time data in the dataset.
GeoSpatial Area Data Span
A spatial region or named place the dataset covers.
Field Value
Access category
Type of access granted for the dataset (open, closed, service, etc).
public
License
License used to access the dataset.
License not specified
Limits on use
Limits on use of data.
Location
Location of the dataset.
https://ontariogeohub-lio.opendata.arcgis.com/datasets/lio::source-protection-information-atlas
Data Service
Data service for accessing a dataset.
Owner
Owner of the dataset.
LandInformationOntario
Contact Point
Who to contact regarding access?
Land Information Ontario
Contact Point Email
The email to contact regarding access?
[email protected]
Publisher
Publisher of the dataset.
Land Information Ontario
Publisher Email
Email of the publisher.
Author
Author of the dataset.
LandInformationOntario
Author Email
Email of the author.
Accessed At
Date the data and metadata was accessed.
2023-01-20
Field Value
Identifier
Unique identifier for the dataset.
76ff0b79d06d49eb8897957dfa872663
Language
Language(s) of the dataset
English
Link to dataset description
A URL to an external document describing the dataset.
https://ontariogeohub-lio.opendata.arcgis.com/datasets/lio::source-protection-information-atlas
Persistent Identifier
Data is identified by a persistent identifier.
Globally Unique Identifier
Data is identified by a persistent and globally unique identifier.
Contains data about individuals
Does the data hold data about individuals?
Contains data about identifiable individuals
Does the data hold identifiable data about individual?
Contains Indigenous Data
Does the data hold data about Indigenous communities?
Portal Type
Platform type of the source portal.
Field Value
Version
Version of the datatset
None
Source
Source of the dataset.
None
Version notes
Version notes about the dataset.
Is version of another dataset
Link to dataset that it is a version of.
Other versions
Link to datasets that are versions of it.
Provenance Text
Provenance Text of the data.
Ontario Ministry of the Environment, Conservation and Parks
Provenance URL
Provenance URL of the data.
Temporal resolution
Describes how granular the date/time data in the dataset is.
GeoSpatial resolution in meters
Describes how granular (in meters) geospatial data is in the dataset.
GeoSpatial resolution (in regions)
Describes how granular (in regions) geospatial data is in the dataset.
Field Value
Indigenous Community Permission
Who holds the Indigenous Community Permission. Who to contact regarding access to a dataset that has data about Indigenous communities.
Community Permission
Community permission (who gave permission).
The Indigenous communities the dataset is about
Indigenous communities from which data is derived.
Field Value
Number of data rows
If tabular dataset, total number of rows.
Number of data columns
If tabular dataset, total number of unique columns.
Number of data cells
If tabular dataset, total number of cells with data.
Number of data relations
If RDF dataset, total number of triples.
Number of entities
If RDF dataset, total number of entities.
Number of data properties
If RDF dataset, total number of unique properties used by the triples.
Data quality
Describes the quality of the data in the dataset.
Metric for data quality
A metric used to measure the quality of the data, such as missing values or invalid formats.

0 Comments

Please login or register to comment.