In many regions, dowsers are still used as an additional method for locating potential groundwater sources. This practice is based on the use of simple tools such as rods or pendulums, which are believed by some practitioners to indicate the presence of underground water. In certain cases, users report successful outcomes, which is one reason why this method continues to be applied in various local contexts.
However, from a scientific and hydrogeological perspective, there is currently no reliable evidence that dowsing can locate groundwater more accurately than random selection. Controlled studies have not demonstrated consistent results that would support its use as a predictive tool in professional groundwater exploration. As a result, dowsing is not considered a valid standalone method in engineering or scientific water resource assessment.
For professional drinking water projects, it is therefore essential that any indications obtained through such methods are not used as the primary basis for decision-making. Groundwater development requires reproducible and measurable data, especially when investments, long-term supply security, and water quality are involved.
Instead, all site selection decisions should be independently validated through established hydrogeological and engineering methods, such as:
- Geology
- Hydrogeology
- Measurements
- Test drilling
These methods provide objective and verifiable information about subsurface conditions, including aquifer presence, depth, yield potential, and water quality. When used together, they form a structured and scientifically grounded decision-making process that significantly reduces uncertainty in groundwater exploration.
In this context, non-scientific indications—if present—may at most be treated as supplementary observations, but they cannot replace systematic investigation methods. This ensures that groundwater development projects remain reliable, reproducible, and technically sound, particularly in critical applications such as drinking water supply.