Tshwane Borehole Rules: Registration, Dolomite Approval and Bylaws

Homeowners in Garsfontein, Centurion, Pretoria East and surrounding suburbs are increasingly turning to boreholes as a hedge against outages and rising municipal tariffs. That is a reasonable decision — but Tshwane’s regulatory environment has more layers than many people realise. Understanding what the City of Tshwane requires, what the national Department of Water and Sanitation (DWS) requires, and what dolomite risk means for your specific stand can save you from an expensive mistake.

National Water Act registration: the non-negotiable first step

Boreholes are regulated primarily at national level. Under the National Water Act (Act 36 of 1998), groundwater is a public resource. Sinking a borehole and using it for anything beyond Schedule 1 domestic use — essentially small volumes for basic household needs — requires a water-use licence or registration with DWS. Even where registration rather than a full licence applies, you must formally notify DWS.

The borehole registration process with DWS involves submitting a water-use registration form (WARMS system) that captures the borehole’s GPS coordinates, depth, casing details, intended use and estimated daily abstraction volume. This is not optional and not purely administrative: DWS uses these records to manage aquifer health across regions. Unregistered boreholes can be ordered sealed at the owner’s cost.

For a fuller picture of the Pretoria-area context, the borehole drilling in Pretoria guide covers what to expect from the drilling process itself alongside the registration requirements.

What City of Tshwane bylaws add on top

The City of Tshwane’s Water Services By-laws regulate how borehole water may be used once it is abstracted. Key provisions that affect residential users include:

• No direct cross-connection between borehole supply and the municipal potable network. The two systems must be physically separated to prevent backflow contamination.
• Meter or meter-equivalent records may be required if you use borehole water for irrigation above certain volumes — confirm the current threshold with the City directly, as these figures are periodically revised.
• Discharge rules: borehole wastewater (from backwashing filters, for example) may not be discharged to stormwater drains without authorisation.
• Signage: where borehole water is used for non-potable purposes (garden irrigation, car washing), the City encourages clear labelling of tap points. Some areas require it.

The bylaws are enforced by Tshwane’s Water and Sanitation Department. Penalties for non-compliance range from formal notices to fines; repeat or serious breaches can result in a compliance order requiring the borehole to be decommissioned.

If your property is in Johannesburg rather than Tshwane, the rules differ — the borehole permission guide for Johannesburg explains those distinctions.

Dolomite: the issue that overrides everything else

Large portions of Tshwane — including suburbs in the Centurion corridor, parts of Pretoria West and scattered pockets throughout the city — sit on dolomitic ground. Dolomite is soluble rock that can form underground cavities; drilling through it (or altering groundwater movement near it) can trigger sinkhole formation.

If your property falls within a dolomite-risk zone, you need a geotechnical investigation and site assessment before drilling. This is typically conducted by a registered professional engineer or geologist. The assessment will classify the site’s inherent hazard level and recommend whether drilling is permissible, what drilling method is appropriate, where on the stand the borehole should be positioned, and what ongoing monitoring is required.

The City of Tshwane and the national Department of Human Settlements both maintain dolomite-risk maps, but these are indicative, not definitive. Even a stand just outside a mapped dolomite zone may warrant investigation if geological surveys suggest risk nearby. The rule of thumb: if there is any doubt, commission the assessment. A geotechnical report typically costs a fraction of what a sinkhole claim — or a forced borehole abandonment — would set you back.

Drilling contractors operating in Tshwane should be able to advise whether your area is flagged as dolomitic, but the formal assessment must come from an independent geotechnical professional, not the driller.

Want to find a contractor who knows Tshwane's dolomite zones and registration requirements? Compare 3 free quotes — vetted installers, no obligation.

Water quality and SANS 241

Registration does not certify that your borehole water is safe to drink. Groundwater chemistry in Tshwane varies considerably by area: some aquifers yield excellent quality water, others show elevated iron, manganese, nitrates or microbial contamination.

SANS 241 (2024 edition) is the South African standard for drinking water quality. If you intend to use borehole water for human consumption, you should have the water tested by an accredited laboratory against SANS 241 parameters before choosing any treatment system. The principle is test first, treat second — installing a filter without knowing what you are filtering out is guesswork, not water management.

The Garsfontein borehole drilling pillar page covers local aquifer considerations and typical water-quality findings for that part of Pretoria East, which is useful context before you commission testing.

How costs stack up in the Tshwane area

Tshwane is not Johannesburg, so use Johannesburg figures only as a reference point. As a rough guide, complete borehole systems in Johannesburg run R40,000–R150,000, with most residential installations falling between R60,000 and R100,000; pump-only installations typically cost R15,000–R35,000 installed. Tshwane pricing may differ depending on depth-to-water, rock type, access and the specific contractor. Always get itemised quotes — and factor in the cost of a geotechnical assessment if dolomite risk applies to your stand.

Cost item	Johannesburg reference range	Notes
Full borehole system	R60,000–R100,000 (most cases)	Depth-dependent; confirm via quotes
Pump only (installed)	R15,000–R35,000	Motor size and depth affect price
Geotechnical assessment	Varies	Required on dolomitic land; get quotes
Water quality testing	Varies	Use an accredited laboratory
DWS registration	No fee for registration itself	Licence fees differ if a licence is needed

These are rough guides. Confirm everything through written quotes before committing.

Knowing the rules is step one — getting the right installer is step two. Request your free installer quotes — up to three vetted contractors, zero obligation.

Practical checklist before you drill

Working through these steps in order reduces the risk of delays, fines or a borehole you cannot legally use:

1. Check dolomite risk — consult City of Tshwane’s spatial maps or ask a geotechnical professional whether your stand warrants a formal assessment.
2. Commission a geotechnical assessment if required, and get the written report before any drilling contract is signed.
3. Choose a registered driller — contractors should hold membership with the Water Borehole Council of South Africa (WBCSA) or equivalent; confirm this before engaging.
4. Submit DWS registration — your driller can assist with the technical details, but registration is your legal responsibility as the landowner.
5. Review Tshwane bylaws — specifically the cross-connection prohibition and any metering requirements applicable to your use case. Contact the City’s Water and Sanitation Department directly if you need written confirmation.
6. Test the water before using it for drinking or food preparation.
7. Install treatment only after test results indicate what is actually needed.

None of these steps is bureaucracy for its own sake. Each one exists because borehole drilling, done carelessly, can harm aquifers, damage property and put drinking water at risk. Done properly, a borehole in Tshwane can be a reliable, long-term asset.