Water Bore Rehabilitation Keeping Your Bore Healthy For Quality Water - Darr Drilling

Water Bore Rehabilitation Keeping Your Bore Healthy For Quality Water

Water Bore Rehabilitation Keeping Your Bore Healthy For Quality
Water bore rehabilitation is essential at times in order for you to continue having healthy water. Discover how water bore rehabilitation could benefit you now.

Why Keeping Water Bores Clean With Consistent Maintenance Is Important

Water bore rehabilitation is essential when you have decreasing efficiency with your water bore. There are various things which can impact on efficient running of water bores, and as soon as efficiency has decreased, water health implications arise too. Unfortunately, even if you had an incredibly good water bore drilling team come through to drill the water bore for you initially, things can happen with water quality that affect the health of the bore and mechanisms of water supply that give rise to needing water bore rehabilitation work.

Read on, and understand why getting a good water bore rehabilitation team out to improve the health of your water bore might be a really good idea.

  1. Why Keeping Water Bores Clean With Consistent Maintenance Is Important
  2. Benefits Water Bore Rehabilitation For Healthy Water
  3. What Is Borehole Rehabilitation?
  4. Why Do We Need To Rehabilitate Existing Wells?
  5. Borehole Rehabilitation Procedures
  6. Contact Darr Drilling For Reliable Water Bore Rehabilitation

Benefits Water Bore Rehabilitation For Healthy Water

Water bores are known to be reliable sources of water for as long as the owners keep the bores clean and regularly tested. There are problems associated with poor water bore maintenance, including poor water quality, residue, discolouration, and low yield. That is why it is essential to keep water bores clean with consistent maintenance. Here are some of the benefits water bore rehabilitation for healthy water.

Clean and Safe Water Consumption

Water quality is very important when you are using your water bores for drinking. To ensure that it is clean and safe for consumption, it is best to use a water testing lab to check for E. coli and coliform. This is because these are the two most common kinds of water contaminants.

Water pH, dissolved solids, minerals, and microscopic organisms are some of the other things that should be checked to ensure the safety of your water bore when you are using it for drinking water.

Healthy Water Flow

Water bore rehabilitation means your water bore doesn’t dry up because it is well maintained, your water flow remains consistent. Yearly testing is important, especially in areas where droughts are frequent.

Serviceable Pump Mechanism

To minimise the need for water bore rehabilitation, the pumps should be maintained regularly to avoid damage and overheating. Pumps are the most important part of your water bore because sediment, clogging from minerals, low water levels, and water leaks can affect pump efficiency along with the overall quality of your water and the water bore’s condition.

Prevents Contamination and Damage To Water Bore

Regular water bore rehabilitation can help prevent water bores from damage that is irreversible. Every year, it is essential to check the surrounding area for clogs, erosion, and collapsed parts. You should immediately address any sign of pollution to avoid compromising your source of water.

Reduced Energy Costs

Water bore rehabilitation will help decrease the drawdown, thus reducing the energy costs. Freer flowing water places lower stress on water pumps, lower stress on the pump means the motor powering the pump has a lower workload, thus runs more efficiently. Thus it also increases the life of the water bore and the pump.

Creates Baseline Bore And Water Health Figures

Lastly, a regular water bore rehabilitation can help establish a better baseline water supply figure for your water bore that the professionals can use to detect any future problems. Without any point of reference, the experts can have a hard time establishing the variation from usual pH, capacity, mineral content, depth and more of your water bore.

What Is Borehole Rehabilitation?

Water bore rehabilitation involves restoring a water bore that had ceased to be used or has a low flow rate. It also involves maintenance using various reconstruction methods and treatments.

There are different parties involved in water bore rehabilitation, including authorities, village communities, local authorities, users, contractors, craftsmen, technical departments, lending institutions and NGOs. All parties need to work together, from the point of ensuring current standards are met, safety standards are kept to, and the water bore rehabilitation is done effectively overall.

Why Do We Need To Rehabilitate Existing Wells?

There are different reasons why water bore rehabilitation is important. Some of the reasons why water bore rehabilitation should be done include groundwater pollution like animal excrement, or chemical pollutants in the water.

If your water bore doesn’t have sufficient water it should undergo a water bore rehabilitation, potentially it may lack enough depth, this can be addressed by redrilling the bore as part of the rehabilitation.

Water bore rehabilitation is also needed if there is a drop in the water level, resulting in drying up of the water bore itself. Insufficient or damaged concrete well liner or casing, which promotes the risk of water pollution, can also be the reason for water bore rehabilitation. If there are any equipment breakdowns, including the winch and pumps, water bore rehabilitation may be required as well, due to the effects these things have on the bore.

If there is a lack of cleanliness and a possibility of contamination around the water bore, undergoing a water bore rehabilitation is essential to keep the water source clean and safe for consumption.

Borehole Rehabilitation Procedures

The basic water bore rehabilitation may include the following, but may change based on the available tools, as well as the design of the water bore and the contractor’s experience:

  • Record a video of the water bores.
  • Pulling the water bores’ pump.

Using a brush or other percussion tool, pre-clean the water bores to help remove any interior screen or deposits. Cleaning the water bores will help the mechanical and chemical energy to better penetrate.

Remove silt, sand, and loosen any material from the water bores’ bottom using a suction device, air-lift device or bailer.

Pour the premix or chemical into the water bores’ top and inject into the screen area.

Using a brush, aggressively agitate every couple of hours. You may also use a surge block or other tool that will help force the chemical into the formation and gravel pack.

If you are using acid, always check the water’s pH level. If the pH is more than 3.0, it would be best to add in more chemicals. Keep in mind that the pH level should remain at 3.0 or less during the treatment period.

Once done, you can start removing the chemical from the water bore.

Spend some time removing the silt, sand, and dissolve any trapped formation or gravel pack. This procedure may need you to allot extra time and energy, so make sure that you have ample time to do these tasks.

Take a video of the water bore once the water bore rehabilitation is done.

Treating Bore Encrustations or Corrosion


Encrustations are deposits formed in the filling packs, heat exchangers, pipes, and wherever there is hard water and an increase in temperature. The hardness of the water can indicate the concentration of magnesium and calcium, which are both responsible for the formation of calcification and alkalinity of the water.

Treating Encrustations

You can treat encrustations in different ways, one is by using sanitary water. Use the right anti-scaling agents for water consumption with a proportional system. It is advisable to utilise softened water or raw water with the right inhibitory products.

You may also use cooling water with an antifouling product to control the drains properly. The chemicals will work by modifying the calcium carbonate’s structure, thus preventing deposit formation. Lastly, to check the drains, you may use boiled water to demineralise the feed water and add in dispersants.


Corrosion is an electrochemical process wherein the metal is transformed into rust. Some of the factors that influence corrosion are conductivity, oxygen dissolved in the water, acidity and alkalinity of water, water flow rate, bacteria, and temperature.

Treating Corrosion

Treating corrosion means using suitable materials, including stainless steel, aluminium and copper. It is also advisable to work with conditions of around 8.5 pH, while also using a chemical treatment that has corrosion inhibitors. Inhibitors are chemicals that block or reduce the oxidation that is responsible for corrosion by acting on the anode, cathode, or both.

Preventing Biological Clogging of Bores

Biological clogging of water bores is commonly associated with surface water that has been stored in ponds, reservoirs, or water bores. Water bore rehabilitation includes preventing biological clogging of bores, which usually includes biological slimes and algae which are both common contributors.

Water bores that are high in iron may also be a hazard for biological clogging for micro-irrigation systems. The iron that is dissolved in water will provide energy for the iron bacteria. The slime produced by the iron can clog in the emitters in conjunction with chemical precipitates, clay or silt particles in which they can act as a glue to bind the particles all together.

Treating biological clogging during water bore rehabilitation involves the use of biocide to kill all the contaminants. The most common biocides include copper and chlorine. Copper products are used to control the growth in reservoirs and ponds, while chlorine has been injected frequently to micro-irrigation systems.


Water bore reconstruction includes different types of work, which can help with the water bore condition, which usually include the following:

Increase the Depth of the Water Bore

Water bore rehabilitation can involve digging the bottom part of the well to prevent the recession of groundwater following a drop in the water level. The best solution here is to ensure that the bottom of the bore remains well below the level of the water table even during drought.

Water Bore Coating

Water bore rehabilitation includes renovating the old casing of the water bore itself, or installing a first coating. Some of the materials that can be used are concrete rings, concrete blocks, natural stone, and bricks.

Increasing the Wall of the Water Bore

Water bore rehabilitation also includes raising the wall of the water bore to as high as 100cm above ground level. This will help prevent any foreign material from penetrating the water bore.

Contact Darr Drilling For Reliable Water Bore Rehabilitation

Naturally, getting water bore rehabilitation done effectively is most efficient in the long term. Poorly done, or sub-optimal water bore rehabilitation only results in the job needing to be done again within a relatively short period of time. Whereas efficiently done rehabilitation can be very long lasting, depending on the water composition where your water bore is.

For a top quality water bore rehabilitation get in contact with Darr Drilling and request for us to come out and handle the job for you. Our specialist skills in this area, plus high attention to requirements, and longevity of water bores mean that a water bore rehabilitation done by our expert staff will have you enjoying great water for a long time.

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