Region of Waterloo Tier 3

The main findings of the Region of Waterloo Tier 3 Water Budget and Risk Assessment are:

• The delineation of four Water Quantity Wellhead Protection Areas (WHPA-Qs).
• Tier 3 Risk Assessment scenarios predicted a low risk level associated with the urban integrated supply wells and wells in the rural well fields.

Please note the following documents may not be accessible to people with disabilities. If you have a disability and require a document in an alternate format, please contact us.

• Region of Waterloo Tier 3 Water Budget and Local Area Risk Assessment, 2014, Chapters 1-10 (PDF - 1 MB)
• Region of Waterloo Tier 3 Risk Assessment Memos and Peer Review Comments and Responses, 2017 (PDF - 18 MB)
• Region of Waterloo Tier 3 Water Budget and Local Area Risk Assessment Presentation, 2017 (PDF - 5 MB) 

Appendices 

• Appendix A: Figures (PDF - 38 MB)
• Appendix B: Selection of Appropriate WHPA-Q1 Drawdown Contour and; 
  Appendix C: Uncertainty Analysis Conducted for the Regional and Cambridge Models (PDF - 19 MB) 
• Appendix D: Monthly Pumping Rates and Rate Factors for Drought Scenarios by Municipal Well Field and;
  Appendix E: Permit to Take Water Data Table (PDF - <1 MB)
• Appendix F: Municipal Well Hydrographs (PDF - 1 MB)
• Appendix G: Calculation of In-Well Losses and;
  Appendix H: Use of Monitoring Well Data in the Absence of Production Well Groundwater Elevation Data (PDF - <1 MB)