December 12, 2024

• Annual review for bug fixes and workflow improvements
  • Watersheds, Evaluated and Non-Evaluated added
  • Improved workflow for processing large/batch coordinates on back end
  • Multiple values returned for VSASW if multiple water sources are queried
  • Assessment Parcel search improved and fixed for special cases
  • Analytics added for more events and interfaces for user improvement
  • Metadata links to proper documentation for most layers
  • Updated FAQ, Help and Definitions documents
  • Metadata links to proper documentation for most layers

December 10, 2024

• Quinte
• Tweed
  • Correction to ICA from DNAPL to Nitrate

October 8, 2024

• Credit Valley (CTC)
• Caledon Village
  • Correction to WHPA-E from 6.4 to 7.2

July 25, 2024

• GRCA (Grand River Conservation Authority) - Lake Erie SGBLS (Saugeen Grey Sauble Lake Simcoe Conservation Authority) - Nottawasaga Valley
• Shelburne
  • Increased water taking from two (2) existing wells (PW7/PW8) located in the Township of Melancthon within the Grand River Source Protection Area.
  • Updates to the groundwater modelling for three (3) additional Shelburne wells (PW1, PW5 and PW6) to improve accuracy.


• SGBLS (Saugeen Grey Sauble Lake Simcoe Conservation Authority)
• Palgrave - Caledon
  • This is a simple amendment to the 3.71km2 of vulnerable areas around the Palgrave-Caledon East DW System within SGBLS' jurisdiction. No new policies are proposed, and no new landowners are impacted within this 3.71km2. The vulnerable area mapping for this DWS in SGBLS has decreased by 0.14km2 due to this update.


• ABMV (Ausable Bayfield Maitland Valley)
• Century Heights
  • New well, WHPA, VSA_GW, Managed Lands layers
• Lucknow
  • Increase water taking for an existing well of the Lucknow drinking water system

April 19, 2024

• SGBLS (Saugeen Grey Sauble Lake Simcoe Conservation Authority)
• Craighurst
  • New well, WHPA, VSA-GW and Managed Lands layers
• Horseshoe Highlands
  • New well, modified layers: WHPA, VSA-GW and Managed Lands layers

April 5, 2024

• ABCA (Ausable Bayfield Conservation Authority)
• 5 areas all Wells, VSA-GW, WHPA and Livestock
• Auburn, Belgrave, Palmerston, Wingham and Lucknow
  • Removed significant groundwater recharge area (SGRA) vulnerability scores and references to SGRA vulnerability scores from maps and text in both assessment reports.
  • Updated delineations and scoring of the wellhead protection area mapping and corresponding text for the Belgrave (Municipality of Morris-Turnberry) drinking water system within the Maitland Valley Assessment Report to indicate an expansion of the wellhead protection area due to the installation of a replacement well.
  • Updated the calculations and percentages of impervious surface, managed lands, and livestock density and associated maps for all drinking water systems assessed in both assessment reports.
  • Updated wellhead protection area mapping and corresponding text for the Auburn (Municipality of Central Huron) drinking water system within the Maitland Valley Assessment Report to indicate a shift of the wellhead protection area to address an error in the location of the well.
  • Updated wellhead protection area mapping and corresponding text for the Palmerston (Town of Minto) drinking water system within the Maitland Valley Assessment Report to indicate an adjustment to its most protective zone to include a well.
  • Updated wellhead protection area mapping and corresponding text for the Wingham (Municipality of North Huron) drinking water system to remove transport pathways associated with decommissioned private wells and updated information about old private wells within the Maitland Valley Assessment Report.

March 18, 2024

• CTC (Credit Valley, Toronto and Region, and Central Lake Ontario Source Protection Region)
• Changes to wells/WHPA/VSA-GW in Caledon, Caledon Village, Nobelton and Palgrave
• Changes to VSA-SW, IPZ Toronto Islands, new intake/moved

January 15, 2024

• Nottawasaga Valley
• Township of Adjala-Tosorontio
• Colgon Well Supply has been remodelled
• New WHPA boundaries
• New VSA-GW boundaries
• New Managed Lands Livestock boundaries
• Introduction of a new WHPA-E

December 12, 2023

• Annual review for bug fixes and workflow improvements
  • Improved linkage to swipip.ca
  • New layer – Well Water Records
  • New layer – Hydrometric Data Stations
  • Updated data on Source Protection Tier 1 & 2
  • Updated data on PGMN
  • Updated data on PWQMN
  • Search for DWIS Name
• Update to Township of Adjala-Tosorontio
  • Colgon Well Supply has been remodelled
  • New WHPA boundaries
  • New VSA-GW boundaries
  • New Managed Lands Livestock boundaries
  • Introduction of a new WHPA-E

August 10, 2023

• Quinte Conservation Source Protection Area
  • The establishment of an Issue Contributing Area for nitrate for the two existing wells of the Village of Tweed’s drinking water system within the Municipality of Tweed in the County of Hastings
  • Two agricultural-related policies have been revised to include additional measures within the policy text to address the rising nitrate levels. A set of 21 policies addressing land uses (waste disposal, sewage works, agriculture) that could be contributing to increased nitrate levels have also been updated to ensure they also apply to the new nitrate Issue Contributing Area.
• Upper Thames River Conservation Area
  • Minor revisions were made to several water quality policies to remove reference to significant groundwater recharge areas to align with the updates to the assessment reports.
  • Revisions were made to six policies to reflect the updated risk assessments for the handling and storage of fuel that identified additional areas where these activities pose a significant risk. While the policy text of the six fuel policies is not changing, these policies would apply to these additional areas, namely of the areas closest to a surface water intake, and in areas where modeling has demonstrated that a fuel spill could contaminate the source of drinking water for a specific intake.
  • Revisions were made to two policies to reflect that liquid hydrocarbon pipelines are a prescribed drinking water threat activity (and no longer considered a local threat) and would therefore apply to areas where hydrocarbon pipelines pose a significant risk.
  • Two new policies were written to prohibit the application of agricultural source material within the most protective zone around wellheads, as well as to prohibit the generation of agricultural source material from livestock within the most protective zones around the wellhead for the St. Marys drinking water system (Town of St. Marys).
  • Revisions were made to five agricultural policies to address policy implementation challenges and to improve clarity. Moreover, the revised policy text removes the erroneous reference to the nutrient management plan (NMP) as an instrument that is issued by the Ministry of Agriculture, Food, and Rural Affairs (OMAFRA) as NMPs are created and approved by the agricultural operator rather than OMAFRA.
  • Removal of the nitrate water quality monitoring policy for the Wallaceburg drinking water system to reflect that nitrate is no longer an issue of concern at this system.
• Corrections to GRCA IPZ/Vulnerable Surface Water Areas

January 31, 2023

• Layer Changes and Section 35/35/51 Updates for the following Source Protection Areas:
  • Grand River
  • Halton/Hamilton
  • Mississippi – Rideau
  • Credit Valley, Toronto Region, and Central Lake Ontario
  • Upper Thames River
  • Grey Sauble
  • Trent Conservation Coalition
• Various Application Updates
• Major change to underlying data structure including removing old field names, correcting for mandatory and renaming fields. Collapsed IPZ1, 2, 3 into one layer and fixed various others
• Link to Threats Improved
• Layer List reordered and collapsed
• Added features to I Want To
• Switching searches leaving artefacts fixed
• Searching location will now bring up results pane
• Updated various names to reflect government portfolios
• Future link to Tableau active
• Various small bugs fixed

May 25, 2022

• Updates to Saugeen, Grey Sauble, Northern Bruce Peninsula s.36
• Updates to various layers for CTC s.51
• Corrections to GRCA border areas, Shelburne region

May 12, 2022

• Amendments to Mississippi-Rideau Area:
  • A new Well in the Kemptville drinking water system in the Township of North Grenville. In addition this new well has affected the size and shape of the WHPA, VSA Groundwater Vulnerability, Managed Land Livestock Density and Percent Managed Lands.

Febuary 18, 2022

• This update contains data changes for the Trent Conservation Coalition and Upper Thames River Conservation Authority.
• TCC has updated wells, wellhead protection areas, vulnerable ground water scores and managed land livestock density.
• UTRCA has updated wells, wellhead protection areas, vulnerable ground water scores, managed land livestock density and significant ground recharge areas.
• Amendments for the Region of Waterloo:
  • Mannheim wellfield has new wells, wellhead protection areas, vulnerable ground water scores and managed land livestock density
  • Pinebush wellfield has new wells, wellhead protection areas, vulnerable ground water scores and managed land livestock density
  • Clemens Mill new well, wellhead protection areas, vulnerable ground water scores and managed land livestock density
• Amendments for Wellington County:
  • New Tier 3 water budget for Township of Centre Wellington (Fergus and Elora wellfields)
  • WHPA-Q area for CTC’s Halton Hills municipal supply system

December 7, 2021

• View Legend for new Geology Layers from Northern Development, Mines, Natural Resources and Forestry
• Transparency Bar added to Geology and other Layers
• Bathymetry Layer – Great Lakes and Lake Simcoe
• Paris Galt Moraine
• Conservation Authorities Administrative Boundaries
• Ontario Dam Inventory

October 28, 2021

• This update provides improved interactive site selection on mobile platforms
• In Permits to Take Water, enhanced user drawn geographic searches
• Updated vulnerable area mapping