Frequent Questions

The 1996 Amendments to the Safe Drinking Water Act (SDWA) require states to develop and implement Source Water Assessment Programs (SWAP) to analyze existing and potential threats to the quality of public drinking water throughout the state (SDWA Section

Each SWAP must include four major elements: delineating the source water assessment area, conducting an inventory of potential sources of contamination in the delineated area, determining the susceptibility of the water supply to those contamination sources, and releasing the results of the determinations to the public. However, individual SWAPs may differ because they are tailored to each state's water resources and drinking water priorities. More information regarding the specific aspects of a SWAP is available on EPA's Source Water Assessments Web site.
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