GROUNDWATER ISSUES: Wellhead protection under the Safe Drinking Water Act / Steve Roy and Norbert Dee -- Toxicologic risk assessment for groundwater constituents / Jenifer S. Heath -- Groundwater management areas: an example of the management doctrine / Jean A. Bowman -- Agriculture and groundwater quality / T. Al Austin and James L. Maker -- Hawaiian Islands groundwater: a new ball game / L. Steven Lau -- Pacific Islands groundwater: learning the game / James F. Mink.