Drilled Well vs. Dug Well: What Maine Property Owners Should Know

If you've always lived somewhere with public water, buying a rural Maine property can introduce you to a whole new vocabulary.

One of the first questions you may hear is:

"What kind of well does it have?"

For many Maine homeowners, having a private well is simply a normal part of owning property. Instead of receiving water from a municipal system, the property has its own water source right beneath the ground.

But not all wells are the same.

Two of the most common types you'll encounter when looking at Maine homes, camps, and rural properties are drilled wells and dug wells. Both can provide water to a property, but they work differently and can have very different characteristics when it comes to depth, water supply, maintenance, and susceptibility to changing conditions.

Understanding the basics can help you ask better questions before buying your next piece of Maine.

What Is a Drilled Well?

A drilled well is exactly what the name suggests. Specialized drilling equipment creates a relatively narrow bore deep into the ground to reach groundwater, and casing is installed through portions of the well to help protect the water supply and stabilize the opening. Depending on the geology and location of the property, a drilled well can extend hundreds of feet below the surface.

In much of Maine, drilled wells often reach water contained within fractures in the underlying bedrock. The depth of a neighboring well may provide some interesting information about the area, but it doesn't guarantee what will happen on another property. Maine's underground geology can change considerably over surprisingly short distances, which means two nearby wells can sometimes have very different depths and yields.

When you see a drilled well at a property, knowing that one fact is useful—but there are still more questions worth asking.

What Is a Dug Well?

A dug well is generally much wider and shallower than a drilled well. Traditionally, these wells were excavated by hand or machinery until groundwater was encountered, with stone, concrete tiles, or other materials used to support the sides. Rather than reaching deep into bedrock, a dug well typically collects groundwater closer to the surface.

Dug wells can be found throughout Maine, particularly at older homes, farm properties, seasonal camps, and rural properties that have had a water source for generations. Some have reliably served homes for many years, while others may be more affected by seasonal groundwater conditions.

The presence of a dug well shouldn't automatically be viewed as either positive or negative. What matters is understanding the particular well, its history, condition, water quality, and ability to meet the needs of the property.

Why Does Well Depth Matter?

People naturally want to know how deep a well is, but depth alone doesn't tell you whether it's a good well. A deeper well isn't automatically better, just as a shallower well isn't automatically a problem.

What you're really interested in is whether the well provides a reliable quantity of suitable water for the property's intended use.

A drilled well may extend several hundred feet into bedrock before encountering productive fractures, while another property may find an adequate water supply at a much shallower depth. A dug well may depend more heavily on the level of the surrounding groundwater table and therefore respond differently to dry conditions.

When evaluating a property, well depth is one piece of information. It shouldn't be the only one.

What Does Well Yield Mean?

Another term you'll encounter is well yield, which generally describes how much water a well can produce over a period of time.

A household doesn't necessarily need an underground river flowing beneath it. Wells and water systems can be designed around different production rates, storage capacities, household sizes, and patterns of water use. What matters is whether the overall system can reasonably support the demands placed on it.

Think about how water is actually used in a home. Showers, washing machines, dishwashers, toilets, cooking, cleaning, outdoor faucets, and other uses can sometimes occur at the same time. A seasonal camp occupied by two people on weekends may have very different water demands from a year-round home occupied by a large family.

That's why understanding the property's actual water supply is more useful than simply comparing one well's depth with another.

Can a Dug Well Go Dry?

Because dug wells generally rely on shallower groundwater, some can be more affected by prolonged periods of dry weather or changes in the groundwater table. A well that performs perfectly during spring conditions could potentially behave differently after an unusually dry summer.

That doesn't mean every dug well goes dry. Many have provided dependable water supplies for decades.

If you're considering a property with a dug well, ask the seller about its history. Has the well ever run low or dry? Does the owner conserve water during certain times of the year? Has the well required maintenance? How many people have historically occupied the property?

Those real-world details can sometimes tell you much more than simply knowing the well's dimensions.

Water Quantity and Water Quality Are Two Different Questions

A well can produce plenty of water and still have water-quality concerns.

It can also produce excellent-quality water but have a limited yield.

That's why quantity and quality should be considered separately.

Private well water can contain naturally occurring minerals and other substances related to local geology, while shallow groundwater can potentially be influenced by conditions occurring closer to the surface. The appearance, smell, or taste of water alone isn't enough to tell you everything that's in it.

Water testing can provide information about the actual quality of the water rather than relying on assumptions.

If you're buying a Maine home or camp served by a private well, understanding what testing has been performed—and whether additional testing is appropriate—is an important part of evaluating the property.

Clear Water Doesn't Automatically Mean Perfect Water

There's a common temptation to turn on a faucet, see crystal-clear water, take a sip, and conclude that everything must be fine.

Water isn't quite that simple.

Some water-quality issues aren't visible, and some don't noticeably affect taste or smell. On the other hand, water containing certain minerals may have noticeable staining, odor, or taste while still being manageable through appropriate treatment.

Many Maine homes use water-treatment equipment designed to address the specific characteristics of their water. You may encounter sediment filters, water softeners, neutralizers, ultraviolet systems, or other equipment.

If treatment equipment is present, don't simply view it as a collection of mysterious tanks in the basement. Ask what it does, why it was installed, how it's maintained, and when it was last serviced.

Understanding the treatment system is part of understanding the well.

Where the Well Is Located Matters

When walking around a rural property, take note of where the well is located in relation to the house, septic system, driveway, neighboring properties, and other site features.

Wells and wastewater disposal systems both depend on what is happening underground, so their locations can become important when considering existing conditions or future plans. If you're thinking about adding a garage, expanding the house, creating an addition, or changing the septic system, knowing where the existing well is located can help you understand the available space.

Older properties can occasionally present another challenge: nobody immediately knows exactly where the well is.

That's a good question to answer before you need to find it.

What About a Maine Camp?

Camps can make water systems particularly interesting.

A camp may have a drilled well that functions much like the well at a year-round home. Another may have a dug well that has served the property for generations. Some seasonal properties may use systems that need to be drained or winterized before freezing weather arrives.

A camp's water needs can also be very different depending on how the property is used. A rustic hunting camp occupied occasionally throughout the year doesn't necessarily need the same system as a lakefront camp hosting a large family throughout the summer.

As with so many aspects of Maine camp ownership, the important question isn't simply "Does it have water?"

It's "How does the water system work?"

What Should You Ask Before Buying a Property With a Private Well?

Before purchasing a Maine property served by a private well, try to learn as much about the system as reasonably possible. Ask whether the well is drilled or dug, where it's located, approximately how old it is, whether records concerning its construction are available, and whether the seller knows its depth and yield. You can also ask about the history of the water supply, including whether the property has ever experienced water shortages or seasonal changes.

Find out when the water was last tested, what it was tested for, and whether any treatment equipment is installed. If treatment equipment is present, ask about maintenance and servicing. For seasonal properties, determine whether any portion of the water system needs to be winterized.

You don't have to become a groundwater expert to buy a house with a well.

You simply need to know enough to ask the right questions.

Private Wells Are Part of Rural Maine Independence

For someone accustomed to municipal utilities, owning your own water source might initially seem unusual.

For many Mainers, it's completely normal.

There's no monthly municipal water bill, and the water serving your home may come from hundreds of feet beneath the land you own. Like a septic system, generator, wood stove, or private road, the well becomes another part of the property's infrastructure that you learn to understand and maintain.

That independence is one of the defining characteristics of rural property ownership.

The more you understand your property's systems, the better prepared you are to take care of them.

Finding Your True North

At True North Realty Inc, we believe understanding a property means looking beyond bedrooms, bathrooms, and square footage.

Where does the water come from? Where does the wastewater go? Who maintains the road? How does the land drain? What happens during winter? What happens during a dry summer?

Those questions may not be as exciting as choosing a kitchen or imagining furniture in the living room, but they're an important part of understanding what you're buying.

Whether a Maine property has a drilled well, dug well, or another water system, the goal isn't to decide which type sounds better.

The goal is to understand the system serving that particular property and whether it fits the way you intend to use it.

That's another part of Navigating Your Real Estate Journey.

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