Wellhead Protection Plan: What Small Water Systems Need Before the Next Sanitary Survey

A wellhead protection plan is the record that shows how a groundwater system protects the area feeding its wells before contamination reaches the pump. It is not a generic map filed after a grant application. It is an operating document that identifies the well, the area that can affect it, the risks inside that area, and the controls and records the system uses to manage them. If your system relies on groundwater, start by checking your EPA public record free, then compare your existing source water and sanitary survey files to the plan below. This article is compliance information, not legal advice. Your state primacy agency sets the controlling requirements.

What a wellhead protection plan is meant to prove

EPA treats source water protection as the work of protecting the rivers, lakes, streams, and aquifers that supply drinking water. For a groundwater system, the practical question is narrower: what activities can affect the aquifer or well before treatment has a chance to respond? A useful plan answers that question with current local evidence, not assumptions. It gives the operator, board, inspector, and emergency responder the same picture of where the source is vulnerable and who owns the next action.

The five records to keep together

• Well and source profile. Keep the PWSID, well location, source type, construction details available to the system, and the latest water quality results together.
• Protection area map. Use the state approved source water assessment or local hydrogeologic work to identify the area that can contribute water to the well. Do not invent a fixed radius when the state has already defined a protection area.
• Risk inventory. List current land uses and potential contaminant sources inside or near the protection area, such as fuel storage, septic systems, agricultural chemical handling, dry wells, waste sites, or industrial activity. Update it when the area changes.
• Controls and contacts. Record which controls apply, who is responsible, and the contact path for the utility, local planning office, fire department, health department, and state drinking water program.
• Inspection and response record. Retain survey findings, corrective actions, spill or incident notes, sampling results, and plan revisions so the system can show what it did and when.

Do not confuse a source water plan with a monitoring waiver

A source water or wellhead protection plan helps a system prevent contamination and prepare for an incident. It does not replace the monitoring schedule issued by the primacy agency, and it does not erase a missed sample, an MCL exceedance, or a sanitary survey deficiency. Keep the two workstreams connected: the plan explains the source risks; the compliance calendar shows the samples, reports, corrective actions, and notices that are due.

Where the plan connects to a sanitary survey

Sanitary surveys examine the condition of the source, facilities, operation, maintenance, and records. A current wellhead plan makes the source water portion easier to document because the map, risk inventory, contacts, and corrective-action history are already organized. If a survey identifies a significant deficiency, keep the notice and the state approved correction timetable with the plan. Do not describe an item as resolved until the agency or the applicable record confirms it.

Funding can support source water protection work

EPA identifies Drinking Water State Revolving Fund set-asides and its Funding Integration Tool for Source Water as possible routes for source water protection planning and activities. Eligibility and application windows vary by state. A system should confirm the local program rules before treating any source water project as funded or approved.

Turn the plan into a working calendar

The plan only protects the source if someone reviews it before the next deadline or land use change. Orevant's $199 compliance roadmap brings together the public system profile, open compliance signals, and applicable federal and state requirements so an operator can see what needs attention first. It does not replace the state, a licensed engineer, or local emergency direction.

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Sources: U.S. EPA Source Water Protection; EPA Drinking Water Mapping Application to Protect Source Waters; EPA DWSRF source water protection resources. Reviewed August 31, 2026.

FAQ

Is a wellhead protection plan required for every groundwater system?

Requirements vary by state and system type. EPA provides national source water protection resources, but your state primacy agency determines the plan, assessment, monitoring, and documentation requirements that apply to your system.

How often should we update the risk inventory?

Update it whenever land use, ownership, chemical storage, a spill, a new well, or a source water assessment changes. Review it before a sanitary survey and after any incident that could affect the source.

Does a wellhead protection plan replace water sampling?

No. The plan is preventive source management. Sampling and reporting remain separate obligations under the schedule issued by your primacy agency.