All public water suppliers are required to manage an inner-wellhead management zone, a 200-foot radius surrounding a public water supply, by:
•Maintaining adequate isolation distances for newly-installed potential sources of contamination •Monitoring existing potential sources of contamination
•Implementing wellhead protection measures for potential contaminant sources
In addition, owners and operators of a public water supply must prepare a Wellhead Protection Plan, which includes:
•A map showing the delineated wellhead protection areas
•A vulnerability assessment of the wells and the wellhead protection areas
•An inventory of potential sources of contamination within the wellhead protection areas
•A plan to manage and monitor existing and proposed potential sources of contamination
•A contingency strategy for an alternative emergency water supply