How to Choose a Borehole Drilling Company in Johannesburg

Johannesburg’s municipal water system reports non-revenue water losses of 44.8% (2024/25 audited figures), and the city’s reservoir system holds only roughly 27 hours of citywide storage buffer. It is little wonder that homeowners are looking seriously at boreholes. The challenge is that the borehole industry attracts both excellent operators and outright cowboys, and on the surface they can look identical. This guide gives you a practical framework for telling them apart.

Start with legal registration, not marketing claims

In South Africa, anyone drilling a borehole must be registered with the Department of Water and Sanitation (DWS) as a water-use licence applicant or must operate within the general authorisation framework under the National Water Act. Beyond that, the driller and the rig itself should be identifiable in official records.

What to ask for:

• Their DWS registration or contractor number
• Proof that the completed borehole will be logged with the National Groundwater Archive (NGA) — this is a legal requirement, not a courtesy
• A copy of their public-liability insurance (drilling rigs cause significant property damage when things go wrong)

If a company cannot produce any of these on request, move on. This is not bureaucratic box-ticking; it protects you legally and ensures the borehole is on record should you ever need to sell the property or apply for formal water-use authorisation.

Understand what a borehole quote should actually contain

Typical complete borehole systems in Johannesburg run R40,000–R150,000, with most falling in the R60,000–R100,000 range. Borehole pumps alone typically cost R15,000–R35,000 installed. A quote that simply says “borehole — R75,000” tells you almost nothing.

A proper itemised quote should break out at minimum:

• Drilling cost per metre, plus the estimated target depth and what happens if they need to go deeper
• Casing type, diameter and length
• Pump supply and installation (motor, cable, rising main, control box)
• Yield testing — duration, method and whether a written report is included
• Surface completion (wellhead, apron, locking cap)
• VAT

Get at least three quotes and compare line by line. A driller quoting significantly less than others is often cutting corners on casing, pump quality, or yield testing — all of which become your problem later. For a broader overview of what the full system involves, the borehole drilling guide on this site explains each component in plain terms.

Ask about local reference holes — this is your best due-diligence tool

Johannesburg’s geology is highly variable. The Witwatersrand Basin’s quartzites, shales and dolomitic formations behave very differently from one suburb to the next, and a driller’s experience fifty kilometres away tells you relatively little about what they will encounter under your garden.

Ask every company you approach:

• “How many boreholes have you drilled within three to five kilometres of my address in the past two years?”
• “Can you share the borehole logs for two or three of those?”
• “Are any of those clients willing to take a call?”

A confident, experienced driller will answer these questions without hesitation. Logs show you the depths, the lithology they encountered, and the yields achieved. Speaking to an actual past client in your area is worth more than any testimonial on a website.

The yield guarantee red flag

This is the single clearest dividing line between an honest driller and a dishonest one: no reputable company guarantees a specific yield before drilling.

Groundwater yield depends on fracture zones that cannot be reliably predicted from the surface. Responsible drillers may use hydrogeological surveys or remote sensing to improve the probability of striking a productive aquifer, and those tools are worth paying for. But they remain probability tools, not certainties.

If a driller tells you they “guarantee” 3,000 litres per hour, ask to see that guarantee in writing with a clear refund or redrill clause. Most will quietly drop the language. If they put it in writing without such a clause, read it very carefully — “guarantee” in a sales pitch rarely survives contact with a contract.

When you do receive yield test results, insist on a proper step-drawdown test conducted over several hours, not a five-minute bucket test. The result should tell you sustainable yield, not peak yield.

Already have the basics sorted and ready to move? Compare 3 free quotes — vetted installers, no obligation.

Water quality: SANS 241 and what testing you need

A borehole produces groundwater, not municipal water. In Johannesburg, groundwater chemistry varies considerably — some areas yield clean, potable water; others produce water with elevated iron, manganese, nitrates or, in dolomitic areas, hardness levels that will destroy appliances within a year.

SANS 241 (2024 edition) is the South African drinking-water quality standard your water should be measured against if you intend to drink it. Before committing to any treatment system, insist on a full laboratory water-quality analysis after drilling and before commissioning — not the driller’s on-site test kit reading.

Ask prospective drillers:

• Do they conduct baseline water-quality sampling as part of the package, or is it extra?
• Which SANAS-accredited laboratory do they use?
• What treatment, if any, do they recommend based on typical results in your area — and can they show you the data behind that recommendation?

A driller who cannot speak to local water quality is not operating in your area regularly enough to be your first choice.

Pump selection and ongoing costs

The pump is often where margins get squeezed. A lower upfront quote sometimes means a cheap, unbranded submersible pump with no local parts availability, which becomes an expensive problem the first time it fails.

Ask specifically:

• What brand of pump do they supply, and are spares stocked locally in Johannesburg?
• What is the pump’s power consumption at the proposed duty point? (This affects your monthly electricity bill — as a rough guide, confirm specifics with quotes)
• What warranty does the pump carry, and who handles warranty claims — the driller or the manufacturer’s local agent?

Borehole pumps typically cost R15,000–R35,000 installed, so this is not a trivial component. Some homeowners pair their borehole with a backup tank-and-pump system; those typically run R20,000–R40,000, with whole-house setups around R55,000.

Getting quotes from multiple drillers is the most effective way to spot outliers — both overpriced and underspecified. Get your three free quotes here — no obligation, vetted local installers only.

How to make your final decision

Once you have three compliant, itemised quotes and have spoken to local references, compare the following in order of importance:

Factor	What to look for
DWS registration	Confirmed, not just claimed
Local drilling history	Logs and references within 5 km
Yield test method	Step-drawdown test, written report included
Pump brand and warranty	Reputable brand, local spares available
Depth overrun policy	Clear per-metre rate stated in writing
Water quality testing	SANAS-accredited lab, included in quote
Contract clarity	NGA logging, timeline, payment milestones

Price matters, but it should be the last filter, not the first. A borehole is infrastructure that should serve your property for twenty to thirty years — getting the installation right costs far less than correcting a poor one. The borehole drilling overview covers the full decision process if you are still weighing up whether a borehole is right for your property.