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Net Blue: Offset Methodology

The Net Blue project team, with the advice of its Project Advisory Committee, developed an Excel spreadsheet to accompany the Model Ordinance to show methods for calculating water offsets. This tool is designed to help project applicants and municipal officials in determining the extent of the needed offsets and how an applicant might easily meet them. The Alliance for Water Efficiency, one of Net Blue’s project partners, led the development of this product.

Net Blue Offset Methodology User Guide CoverThe Offset Methodology provides a user-friendly structure for calculating offsets from off-site water conservation retrofits, rainwater harvesting, and stormwater capture. The Offset Methodology can be used by planning and zoning staff, builder and developer applicants, lawyers, water utility staff, and others in the community. It is an Excel file that can be downloaded and used freely. The Offset Methodology can also be amended by the community to suit local conditions. All the calculations are open source.

  • The Offset Methodology leads a user through the options of selecting offset, and allows the building of efficiency strategies to meet the offset requirement. NOTE: the spreadsheet works best on Microsoft Excel 2010.
  • The Offset Methodology User’s Guide details how the methodology spreadsheet functions, explains the options in the individual sheets, and provides tips for maximizing the potential of the methodology.
  • Three Offset Methodology examples demonstrate how the offset methodology can be used in different ways.

To request the Offset Methodology, User Guide and examples, click here.

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