Borehole vs Wellpoint — Which Do You Need? (South Africa Guide)

The most common confusion for first-time buyers of a private water solution is the difference between a borehole and a wellpoint. They're both ways to access groundwater, but they work very differently, suit different geological conditions, and have very different cost profiles. Here's the complete comparison for South African conditions.

What Is a Borehole? What Is a Wellpoint?

Borehole

A borehole (also called a water well in international contexts) is a deep, small-diameter hole drilled into rock or earth to reach a confined or semi-confined aquifer. In South Africa, boreholes are typically:

• 30m–150m deep (depending on geology)
• 100mm–200mm in diameter
• Drilled through solid rock using percussion or rotary drilling methods
• Fitted with a steel or PVC casing to prevent collapse
• Equipped with a submersible pump lowered on a drop cable and rising main

Wellpoint

A wellpoint is a shallow tube (typically 25–50mm diameter) driven or jetted into soft ground to reach a shallow, unconfined water table. Wellpoints are typically:

• 3m–10m deep
• Only suited to areas with a high, shallow water table
• Driven into sandy or alluvial soils — they cannot penetrate rock
• Connected to a surface-mounted suction pump (max 8m lift)
• Much cheaper to install, but much less reliable in drought conditions

Which Geology Suits Each?

Wellpoints work in: Coastal sandy soils (Cape Flats, Durban Berea), river flood plains, alluvial deposits. The water table must be within 6–8m of the surface. This is why wellpoints are common in Cape Town's southern suburbs and parts of Durban, but almost unheard of in Johannesburg's granite-based geology.

Boreholes work in: Effectively all South African geological formations — granite, quartzite, dolomite, shale, sandstone. They are the only option in Gauteng (where the water table is 30m+ in most areas) and across the Highveld generally. See our location guides for your suburb's specific geology and drilling requirements.

Cost Comparison

Item	Wellpoint	Borehole
Installation	R5,000–R15,000	R35,000–R120,000+
Pump	R2,500–R6,000 (surface pump)	R8,000–R30,000 (submersible)
Casing / lining	Included in most quotes	R8,000–R18,000
Total system	R8,000–R20,000	R40,000–R150,000
Lifespan	5–15 years	20–40 years
Drought reliability	Low–medium	High
Permit required	Usually no	DWS registration recommended

Yield and Reliability

Wellpoints access the unconfined (phreatic) aquifer — the shallow water table that rises and falls with rainfall. During a drought or dry season, the water table can drop below the wellpoint depth entirely, leaving you dry. This is a significant risk in South Africa's increasingly variable climate.

Boreholes access confined or semi-confined aquifers deeper in the rock, which are less affected by short-term rainfall patterns and much more reliable year-round. In fractured rock aquifers (like Johannesburg Granite), the water source is replenished over decades and is largely insulated from single-season droughts.

For year-round reliability as a primary water source, a borehole wins clearly. Wellpoints are better suited as a secondary irrigation supply rather than a primary household source.

When to Choose a Wellpoint vs a Borehole

Choose a wellpoint if:

• You're in coastal Cape Town, Durban Berea, or another area with sandy soils and a high water table
• You only need water for garden irrigation (not household use)
• Your budget is under R20,000
• You're testing whether groundwater is available before committing to a full borehole

Choose a borehole if:

• You're anywhere in Gauteng, the Highveld, Limpopo, Mpumalanga, or Free State
• You need water for household use (drinking, cooking, bathing)
• You need year-round reliability as a primary supply
• You want to add significant value to your property
• You're investing in a long-term solution (20+ years)

Frequently Asked Questions

Can I install a wellpoint in Johannesburg?

In most of Johannesburg, no. The Johannesburg Granite Dome means hard rock begins within a few metres of the surface in most suburbs — wellpoints cannot penetrate rock. The water table is also typically 30–100m deep, far below the reach of a wellpoint. You need a borehole. See your suburb's guide in our location section for specific geology data.

Is borehole water better quality than wellpoint water?

Generally yes. Borehole water from deeper, confined aquifers is more protected from surface contamination (agricultural chemicals, septic tanks, stormwater). Wellpoint water from shallow water tables is more vulnerable to contamination, especially in urban and peri-urban areas. Both should be tested before domestic use.

Can I convert my wellpoint to a borehole later?

No — these are completely different structures. You cannot deepen a wellpoint into a borehole. You would need to drill a separate, new borehole (on a different spot if space allows) and decommission the wellpoint. However, if a wellpoint confirms there's water in the area, that's useful information for deciding where to drill the borehole.