Hi. We had a similar problem a few years ago in the Mendiolaza area, a few kilometers from where you are. The problem is the natural slopes of the area. They are a problem in the sector, so long indentations (min 40 mt) are used to avoid making deep wells. Ideally, you should hire a well from the area to evaluate this since you may have to do another well or if the napa is superficial it can be derived with a sewer pipe. In a well-known country in the area there are constant "rivers" with automatic water pumps to avoid this. Regards