Annlin sits on Bushveld Complex ground north of the Magaliesberg, where the weathered zone above fresh norite carries the water.
Results here vary in step with how deeply the rock has weathered, which is not visible from the surface.
What Is Under Annlin
| Formation | Where it sits | What it means for drilling |
|---|---|---|
| Bushveld Complex norite and gabbro | The bedrock across the ground north of the Magaliesberg ridge | Coarse mafic rock that carries water only where it is deeply weathered and jointed. Where it is fresh and unfractured it is close to barren. |
| The weathered mantle | The zone between soil and fresh rock, from a few metres to tens of metres thick | The main water-bearing horizon on this ground, which is why depth to fresh rock matters more here than total depth does. |
| Granophyre ridges and diabase dykes | The low ridges and intrusions cutting the mafic sequence | Joints and contacts carry water; the intrusive body itself does not. Locating them is what a survey is for on this ground. |
Send your street and what the water is for, and get an itemised quote for Annlin.
Get a Annlin Borehole QuoteWhat That Means for Your Borehole
- Drilling past fresh unfractured norite adds cost without adding yield so knowing when to stop is part of the job.
- Iron and manganese are worth testing for because mafic ground more often produces water that stains and needs treatment.
- Results vary over short distances in step with how deeply the rock has weathered.
Where We Work Around Annlin
- Annlin and Annlin West
- Sinoville boundary
- Wonderboom approaches
- Magalieskruin side
- Montana edge
- Complexes and cluster developments
- Schools and community facilities
What to Watch For Here
Neighbouring results differ more than people expect. Weathering depth varies over short distances on this ground, so one stand can have a productive borehole and the one next door a poor one. It is a function of the geology rather than of who did the drilling.
Suburban infill has increased demand on the network. Annlin has densified through complex and cluster development, and pressure issues at the network edges are a recurring complaint. Storage is what makes a borehole useful as a standby supply rather than only as an irrigation source.
What the Water Is Used For
- Keeping established gardens alive from June to October
- Continuity cover during water interruptions
- Common areas across complexes and estate developments
- Cutting the volume bought from the metro each month
- Topping up the pool, subject to what the analysis says
Wellpoint or Borehole?
Not viable. The residual soil over norite is clay-rich rather than sandy and the water table sits below suction range. A wellpoint has neither the material nor the shallow water it needs.
Registration and Abstraction
A completed borehole here should be registered with the City of Tshwane, and the responsibility for that sits with the property owner rather than with the driller. Separately, the National Water Act governs how much you may abstract: reasonable domestic use and small-scale gardening generally fall under Schedule 1, while larger, agricultural or commercial abstraction may require registration or a water use authorisation from the Department of Water and Sanitation. The position on domestic registration was being actively revised during 2026, so confirm your obligations before drilling rather than afterwards.
Related Services
For the drilling process itself, the geology across the wider metro and how a quote is put together, see Borehole Drilling Pretoria.
Borehole Prices in This Area
Drilling is charged per metre, so depth drives the total. The ranges below are framed for local ground conditions and access.
| Item | Indicative range | What moves it locally |
|---|---|---|
| Drilling, per metre | R500 - R1,200 /m | Weathered norite drills readily; fresh norite and gabbro are hard and slow. Where the transition sits is not known in advance. |
| uPVC casing, installed, per metre | R400 - R700 /m | Diameter and class. The weathered mantle is the section that needs casing and its thickness varies widely. |
| Mobilisation and site establishment | R2,500 - R9,000 | Access and site conditions move this; a site visit settles it before quoting. |
| Water survey | R5,000 - R12,000 | Targets structure rather than depth. Worth most where yield is fracture-dependent. |
| Yield testing | R3,500 - R15,000 | Establishes the sustainable rate that pump selection depends on. |
| Pump, supplied and installed | R15,000 - R45,000 | Greater depth means more head, which means a larger pump and heavier cable. |
| Storage and booster | R12,000 - R35,000 | Needed wherever peak demand exceeds the borehole's sustainable rate. |
| Typical complete project | R70,000 - R200,000+ | Everything above, excluding treatment, which depends entirely on the water analysis. |
These are indicative ranges, not a quotation. They are compiled from published South African supplier and contractor pricing to give you a starting point for budgeting. They are not our rate card, and no figure here is a commitment.
Treat them as a broad guide only. Published borehole pricing in South Africa varies enormously - 2026 guides quote per-metre drilling rates for Gauteng ranging from under R300/m to R1,500/m, a spread of more than five to one - because depth, geology, access, specification, distance and fuel costs all move the number. Depth in particular is not known until the hole is finished. Figures generally exclude VAT unless noted, and change over time. Only an itemised written quote against your actual site means anything.
Annlin Borehole FAQs
Why is my neighbour's borehole better than mine?
On this ground it is usually the depth of weathering. Where the norite has broken down deeply there is water; where fresh rock sits close to surface there is much less.
That can change over a short distance, which is why siting is worth doing carefully and why no yield can be promised before drilling.
How long does the drilling take in Annlin?
Weathered norite drills reasonably quickly, so the drilling itself is often a day or two. Fresh rock slows it considerably.
The full project including development, testing, pump and storage runs longer, and the yield test is the step worth not rushing.
Do I need a survey in Annlin?
It is useful here, because it helps identify where weathering is deeper and where jointing is better developed.
It does not guarantee water and should not be sold as though it does. It improves the odds of a good position.
What treatment is commonly needed here?
Iron and manganese removal comes up more often on mafic ground than elsewhere in the city, because of the rock the water passes through.
The analysis determines it. Fitting treatment before testing generally means paying for the wrong thing.
DRILLING IN ANNLIN?
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