Water is a fragile resource, and access to it could become uncertain if modern infrastructure fails. Securing your water supply is therefore essential if you want long-term independence.
In a crisis situation or during war, building a well or borehole can be an effective preventative strategy. It is entirely possible to improve your resilience by having an independent and sustainable water source.
Should You Choose a Traditional Well or a Deep Borehole for Water Independence?
If you want an independent system for drawing water, you need to make an important decision: traditional well or borehole? The first option has the advantage of being simple and affordable. It is dug manually or mechanically to a depth of around 10 to 15 metres, giving access to shallow groundwater. The cost generally ranges from €1,500 to €4,000 depending on location and ground conditions.
By contrast, a borehole is deeper and requires a higher investment as well as more technical expertise. You need specialist machinery capable of reaching groundwater at depths of 30, 50 or even 100 metres. The budget is usually around €5,000 to €15,000. This higher cost is justified by greater longevity and better protection against bacterial contamination.
A properly installed borehole usually provides more stable water quality, even during prolonged droughts. Depending on geological constraints, finances and your self-sufficiency goals, the choice should therefore be made carefully. In regions where shallow groundwater is vulnerable or unavailable, a deep borehole is often the better option.
Choose the Right Location to Ensure Long-Term Reliability
Before starting any work, you need to identify the groundwater source accurately. Preliminary hydrogeological studies are essential to locate suitable areas for a well or borehole. Dowsing remains popular, but it lacks recognised scientific reliability. It is therefore better to rely on professionals using dependable tools such as geophysical surveys, satellite imaging or geological analysis.
For example, methods based on electromagnetism or ground-penetrating radar (GPR) can reliably detect underground water sources. Once the water table has been located, assess contamination risks carefully. Always avoid locations close to septic tanks, intensive farming sites or industrial zones. Ideally, choose a site at least 50 metres away from these pollution sources.
What Size Installation Matches Real Water Needs?
Building a well or borehole should not be improvised without first calculating your household’s water needs. On average, one adult uses between 80 and 150 litres of drinking water per day depending on use. A family of four may therefore need between 320 and 600 litres daily.
- During a crisis, sensible management can significantly reduce consumption.
- Even so, allow a minimum of 50 litres of drinking water per person per day for drinking, cooking and basic hygiene.
Your well should therefore provide a regular minimum flow rate, ideally above 0.5 m³ per hour, to reduce shortages during long dry periods. A traditional well with a diameter of one metre and a depth of 10 metres generally offers around 8 m³ of immediate storage. This is often enough to handle daily fluctuations.
Is Groundwater Quality a Concern?
You may have an independent water source, but water quality then becomes the next question. According to a study by the French Geological Survey (BRGM), around 20% of French groundwater sources show contamination from nitrates or bacteria. A full health and safety analysis of extracted water is therefore strongly recommended after installing a well or borehole.
Regular bacteriological testing by an accredited laboratory is an essential preventative step. In addition, consider installing a gravity filter such as the one offered by Weeplow.
- It works without electricity, so it can be used at home or taken in a caravan.
- The filter lifespan is around two years, which can be valuable during periods of disruption.
- The activated carbon filter removes up to 99.99% of contaminants, including pesticides, viruses and PFAS, providing cleaner water for consumption.
It is also very easy to use, making it an ideal addition to water from a well or borehole.
What Is the Legal Position on Building Wells?
In France, creating a private-use well or borehole is subject to legal requirements. Since the order of 11 September 2003, property owners are expected to declare the installation to their local town hall. This declaration includes technical details of the system and initial water quality test results.
Failure to comply may lead to financial penalties of up to €75,000 where environmental or public health damage is proven. Following these regulations carefully helps avoid disputes while ensuring compliance and sanitary safety.
Prepare Today for Water Independence
If infrastructure disruption ever occurs, planning your water independence in advance can be a wise decision. Build your well or borehole now and combine your installation with the Weeplow gravity filter to help ensure safe drinking water. This can offer your family reliable long-term protection during uncertain times.
