Understanding Two Water Well Drilling Considerations

Construction & Contractors Blog

If your home is not supplied with city water, then you may need to have a water well installed to supply you with fluid instead. Wells are drilled into the earth with the use of drill rigs, and a rotary drill will often be forced 1,000 feet or more into the earth. Wells are typically positioned in areas where a ground aquifer is able to supply the well with a constant supply of water. The aquifer itself may dictate the location of the well. However, there are a variety of other factors that also need to be considered when finding the best location for a well.

Leach Field Location

If you do not have access to city water, then you likely do not have sewer lines connected to your home. This means you have a septic system with an attached leach field. This leach field will allow fluid wastes to drain into the earth. If this leach field is located near the drilled well, then the wastes can enter the well through openings or cracks that may form in the casing over time. This can cause coliform bacteria to enter your water. These bacteria can cause a variety of gastrointestinal issues. 

Fluid wastes will move vertically away from the septic drainage field and eventually leach into the groundwater. The vertical movement will depend on the volume of wastes, the composition of the soil, and the saturation of the ground. To avoid fluids entering your well, it is best to have the well drilled as far away from the leach field as possible. Placing the well on the opposite side of the home as the leach field is a good choice.

Direction Of Water Flow

Ground water, leach field drainage, and water that flows out of an aquifer will seep deep into the ground to the layer of bedrock that sits hundreds or thousands of feet below the earth. The water will flow to a river, stream, or other waterway. As the water flows, it will pick up contaminants. This contaminated water may come into contact with the well or the aquifer. To prevent this issue, make sure the well is placed on a high area of your property. The flow of ground water typically follows elevation, from high to low. This means that the well will be far from draining fluids if it is secured high on the property.

You may need to work with a survey professional so a topographical map can be created of the property. This will help you to see areas of high and low elevation so a good well location can be located. 

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