Wellhead Protection (WHP) and Source Water Protection
The protection framework
Wellhead Protection (WHP) and Source Water Protection (SWP) focus on preventing contamination of public drinking water supplies. In Nebraska, NDEE administers the state WHP/SWP program under the Safe Drinking Water Act. A public water system delineates a wellhead protection area (WHPA), inventories potential contaminant sources, and adopts management and contingency plans.
What the exam tests
- The difference between a source water assessment, which characterizes the source and threats, and wellhead protection, which implements local protection.
- WHPA delineation methods: fixed radius, hydrogeologic mapping, and vulnerability assessment.
- The driller's role: proper casing, grouting, annular sealing, sanitary well caps, setback compliance, and preventing cross-connections.
- Coordination with local officials, the NRD, and NDEE.
Worked example
A city well sits near a proposed new commercial development with a fuel island. The WHPA includes the proposed site. The city's WHP plan identifies fuel storage as a potential contaminant source and requires spill containment and monitoring. A driller asked to install a monitoring well must follow the plan and state standards, and the project may need local review before construction. Reasoning: WHP does not replace well construction standards; it adds a source-protection layer.
Traps
- Confusing WHP with a well-drilling permit.
- Assuming the WHPA is always a simple circle.
- Ignoring potential contaminant sources inside the area.
- Treating a public water system's plan as advisory when local rules adopt it.