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TitleUpdate on COA and GLWQA groundwater activities
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorMacRitchie, S
SourceRegional-scale groundwater geoscience in southern Ontario: an Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario geoscientists open house; by Russell, H A JORCID logo; Ford, D; Priebe, E H; Holysh, S; Geological Survey of Canada, Open File 8363, 2018 p. 25, Open Access logo Open Access
PublisherNatural Resources Canada
MeetingRegional-Scale Groundwater Geoscience in Southern Ontario: Open House; Guelph; CA; February 28 - March 1, 2018
Documentopen file
Mediaon-line; digital
RelatedThis publication is contained in Regional-scale groundwater geoscience in southern Ontario: an Ontario Geological Survey, Geological Survey of Canada, and Conservation Ontario geoscientists open house
File formatpdf
NTS30; 31C; 31D; 31E; 40; 41; 42C; 42D; 52A; 52B; 52H
AreaGreat Lakes; Canada; United States of America
Lat/Long WENS -92.5000 -76.0000 49.5000 41.0000
Subjectshydrogeology; environmental geology; Nature and Environment; groundwater; groundwater resources; aquifers; resource management; water quality; surface waters; lakes; governments; ecosystems; groundwater regimes; pollutants; source areas; chloride; nitrate; climate; Great Lakes Basin; Federal provincial agreements; International agreements; mitigation; Mitigation; monitoring; Climate change
ProgramGroundwater Geoscience Aquifer Assessment & support to mapping
Released2018 02 16
AbstractThe Canada-Ontario Agreement (COA) on Great Lakes Water Quality and Ecosystem Health (2014) is the 5 year federal-provincial agreement to help meet Canada's obligations under the Canada-US Great Lakes Water Quality Agreement (GLWQA). The first goal of COA Annex 8 Groundwater Quality is to gain a better understanding of how groundwater influences Great Lakes water quality and ecosystem health, and to identify priority areas for research and investigation. The COA commitment to meet this goal included Ontario and Canada working with the United States to develop the state of groundwater science report.
Groundwater science relevant to the Great Lakes Water Quality Agreement: A status report was released in May 2016 and is available on The report is a product of collaboration among groundwater experts from both countries and summarizes current knowledge on groundwater and identifies science needs to better understand the role of groundwater in the Great Lakes Basin.
The short term (2017-2019) science needs that were identified by the Annex 8 team include: 1: Develop better tools to assess groundwater - surface water interaction and use them to advance assessment of regional-scale groundwater discharge (quantity) to surface water in the Great Lakes Basin; 2: Establish science-based priorities to advance the assessment of the geographic distribution of known and potential sources of groundwater contaminants relevant to Great Lakes water quality, and the efficacy of mitigation efforts; 3: Advance monitoring, surveillance, and assessment of groundwater quality in the Great Lakes Basin.
Ontario funded COA projects that address the short term science needs for groundwater are described. The University of Guelph is developing an integrated groundwater-surface water model that is based on the extensive water and climate data from a COA funded integrated water and climate monitoring station. The current water cycle and future water cycles under various climate scenarios will be investigated.
The Provincial Geomatics Services Centre has identified over 150 databases and inventories of potential point sources of groundwater contamination in southern Ontario. The development of a methodology to assess the results will be developed by COA Annex 8 team.
The GLWQA Annex 8 team was involved with developing the Groundwater Quality Subindicator under GLWQA Science Annex 10. Using concentrations of common groundwater contaminants chloride and nitrate an assessment of groundwater quality in the Great Lakes Basin was conducted for the first time.
Summary(Plain Language Summary, not published)
Proceedings for a workshop in Guelph Ontario as part of the program S&T exchange. Abstracts have been contributed by Ontario Geological Survey, Ministry of Environment and Climate Change, Conservation Authorities, Universities, private sector, and Unites States Geological Survey.

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