​​The July 2006 Interim Report of the Advisory Committee on the Management and Protection of the State’s Water Resources (informally referred to as the Wolman Committee report) states on Page 2:

This report highlights the need for extensive new regional and statewide plans and studies to better measure and understand the capabilities of the water supply resources in the state. (The Committee will complete its final report in July of 2008.​)

These detailed hydrogeologic studies, for which only limited funding has been provided to date, will take many years to complete even if adequately funded. In the meantime, state and local governments must carry out the WRE using the best information available on ground and surface water quantity and quality as they affect water supply needs. As additional and better data become available, these data should be assimilated into updates and revisions of this guidance document and in local planning documents.