New Borehole vs Reviving an Old One

Many Johannesburg stands — particularly older properties in suburbs like Randburg, Sandton, and the East Rand — have a capped or forgotten borehole somewhere on the property. Before you commit to a new drill, it is worth finding out what you already have. The answer could save you a significant amount of money, or it could save you from pouring money into something that will never perform.

Why dormant boreholes are common in Joburg

Borehole drilling in Johannesburg went through distinct booms: the 1970s and 1980s for irrigation, and again after the load-shedding and water-pressure crises of the 2000s and 2010s. Many of those installations were abandoned when pumps failed, when owners moved, or simply when municipal supply felt reliable again. The borehole itself — the drilled hole and casing — was capped and forgotten.

The infrastructure question is whether any of that original work still has value. In many cases, it does. In some, it does not.

The two tests you need before deciding anything

Do not spend money on rehabilitation until you have completed these two steps.

Camera inspection. A borehole camera (typically lowered on a cable by a specialist) will reveal whether the casing — usually steel or uPVC — is intact, cracked, corroded, or collapsed. A collapsed casing is generally uneconomical to repair. An intact or lightly corroded casing is a strong signal to continue.

Test pumping. A pump is lowered into the hole and run for several hours. This tells you the current yield (litres per hour) and the standing water level. Aquifer yields can change over time due to seasonal variation, neighbouring boreholes, or changes in land use. A borehole that yielded 1,500 litres per hour in 1988 may yield considerably less now, or may yield the same. You need current data, not historical memory.

As a rough guide, a camera inspection and test pump together typically cost a few thousand rand — confirm pricing when you get quotes, as it varies by depth and contractor.

What rehabilitation typically involves — and what it costs

If the camera and test results are encouraging, rehabilitation usually covers some or all of the following:

• Cleaning and jetting: Removing sediment, iron bacteria, and biofilm from the casing walls and screens. This alone can significantly restore yield in boreholes that have simply been sitting idle.
• Screen or casing repair: Where sections are corroded but not collapsed, sleeving or patching may be possible.
• New pump and rising main: Even if the borehole itself is sound, assume the original pump is finished. Borehole pumps typically cost R15,000–R35,000 installed, which is unavoidable whether you rehabilitate or drill new.
• New pump controller and surface fittings: Variable-speed controllers, pressure tanks, and isolation valves round out a working system.

Total rehabilitation costs vary widely depending on depth, condition, and how much of the original infrastructure is reusable. As a rough guide, a straightforward clean-out, new pump, and surface connections on a shallow to mid-depth borehole might land in the R20,000–R50,000 range — but get quotes, because deep boreholes or heavily corroded casings can push that figure considerably higher. Compare that to typical complete borehole systems in Johannesburg running R60,000–R100,000 for most installations, and rehabilitation often shows a clear financial advantage when the hole itself is sound.

If you're weighing up rehabilitation against a fresh drill, a few competing quotes will quickly show you which route makes financial sense. Compare 3 free quotes — vetted installers, no obligation.

When drilling new is the better answer

Rehabilitation is not always the right call. Walk away from an existing borehole if:

• The casing is collapsed or severely corroded at depth — there is no economical fix.
• The aquifer yield is now too low for your intended use, regardless of casing condition. A borehole that delivers a trickle is not a water solution.
• The original borehole was poorly sited — for example, drilled into a formation that was never productive, or located in a position that makes compliant installation of pipework and a pump house impractical.
• The depth is insufficient. Joburg’s water-bearing formations vary considerably across the Highveld, and a shallow hole drilled decades ago may simply not reach productive rock.

If any of these apply, you are better served by reading up on what a full installation involves on our borehole drilling overview and getting quotes for a properly sited new hole.

Regulatory and water quality considerations

Whether you rehabilitate or drill new, the same rules apply. The Department of Water and Sanitation requires boreholes used for domestic supply to be registered as a water use under the National Water Act. Do not skip this step — it is not merely administrative, it protects your legal right to the water.

Water quality must also be tested before you use borehole water for drinking or food preparation. SANS 241 (2024 edition) is the South African drinking-water quality standard. Groundwater, particularly in older urban areas, can carry elevated iron, manganese, nitrates, or coliform bacteria. A dormant borehole may have accumulated contaminants during years of stagnation. Budget for a full laboratory test after any rehabilitation, and again after a few months of use.

Comparing the two routes side by side

Factor	Rehabilitate existing	Drill new
Upfront cost	Potentially lower, subject to condition	R60,000–R100,000 typical range
Speed	Faster if casing is sound	Drilling and installation adds time
Risk	Depends entirely on inspection results	Known unknowns — yield not guaranteed either
Regulatory registration	Still required	Required
Water quality testing	Essential after dormancy	Essential after any new installation
Best case	Productive hole at reduced cost	Fresh start with optimal siting
Worst case	Spend on investigation, still need new hole	Higher cost but full control over placement

The table makes the decision logic clear: rehabilitation is a calculated bet. The inspection costs are your due-diligence fee. If the borehole passes, you are likely saving money. If it fails, those inspection costs have still saved you from a larger rehabilitation spend on something unworkable.

Ready to get actual numbers for your specific borehole or site? Request quotes from vetted installers — free, and with no obligation to proceed.

Making the call

The honest answer is that no one can tell you remotely whether your dormant borehole is worth reviving. The decision lives entirely in the inspection data. What you can do right now is locate the borehole on your property, check any documentation left by previous owners, and commission a camera inspection and test pump from a reputable contractor before spending anything further.

If the results are good, you may have a significant asset sitting capped in your garden. If they are not, you will at least know you are starting from a clean slate — and you can plan accordingly.