Knysna sits on hard Kaaimans rock around a lagoon, which means fracture-dependent yields inland and salinity questions close to the water.
Water security has been a live local issue, and boreholes here are often about resilience rather than saving on irrigation.
What Is Under Knysna
| Formation | Where it sits | What it means for drilling |
|---|---|---|
| Kaaimans Group | Beneath much of the forest belt and the river valleys - quartzite, schist and phyllite | Hard, folded metamorphic rock. Water occupies fractures, joints and the weathered mantle rather than pore spaces, so yield depends on intersecting structure. |
| Table Mountain Group | The Outeniqua mountains behind the towns | Fractured quartzitic sandstone and the principal recharge for the whole belt. High yields where fractures are intersected, and the regional water source. |
| Quaternary and coastal deposits | River mouths, estuary margins and the flatter coastal ground | Sand and alluvium holding shallower water. More accessible, and more exposed to whatever happens at the surface. |
Send your street and what the water is for, and get an itemised quote for Knysna.
Get a Knysna Borehole QuoteWhat That Means for Your Borehole
- Depth is an outcome, not a target - the hole continues until it meets a water-bearing fracture.
- Expect casing through weathered material of a thickness nobody can predict beforehand.
- A neighbour's good borehole is weak evidence in fractured ground like this.
Where We Work Around Knysna
- Knysna central and Leisure Isle
- Paradise, Hunters Home and Welbedacht
- Brenton-on-Sea and Brenton-on-Lake
- Belvidere and the western head
- Rheenendal and the forest smallholdings
- Eastford and Pezula approaches
- Guesthouses and hospitality properties around the lagoon
What to Watch For Here
Salinity matters close to the lagoon. Properties on Leisure Isle and around the estuary margins sit near tidal water, and raised chloride and sodium are a realistic possibility that heavy abstraction can worsen.
Water security rather than cost savings drives many projects here, which changes the design: storage sized for a genuine outage, and a system that keeps working when the municipal supply does not.
What the Water Is Used For
- Standby and backup supply for water security
- Guesthouse and hospitality grounds
- Garden irrigation on the larger stands
- Smallholding supply toward Rheenendal
- Pool top-up subject to salinity testing
- Communal landscaping across complexes and estates
Wellpoint or Borehole?
Not an option on the hard rock that underlies these towns. Where sandy cover has real depth near the coast or an estuary it may be possible, and that is worth establishing before pricing a drilled hole.
Registration and Abstraction
This area falls under Knysna Municipality rather than the City of Cape Town, so local registration requirements and by-law conditions are that municipality's. This catches people out when they read Cape Town borehole guidance and assume it applies. The district also falls in the Breede-Gouritz water management area rather than the Cape Town one, which affects how abstraction is administered.
Abstraction itself is governed by the National Water Act. Reasonable domestic use generally falls under Schedule 1, but irrigation and commercial volumes usually require registration or a water use authorisation from the Department of Water and Sanitation. Confirm both before drilling.
Related Services
For the drilling process itself, the geology across the wider metro and how a quote is put together, see Borehole Drilling Cape Town.
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 | R550 - R1,300 /m | Kaaimans quartzite and schist are hard, slow drilling, and depth to a water-bearing fracture is not predictable. |
| uPVC casing, installed, per metre | R400 - R700 /m | Diameter and class. Weathered-zone thickness is not known until drilling starts. |
| Mobilisation and site establishment | R2,500 - R9,000 | Distance from base and site access both move this; the site visit settles it. |
| 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 | R85,000 - R230,000+ | 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 - different 2026 guides quote per-metre drilling rates for the same province that differ by a factor of three - 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.
Knysna Borehole FAQs
Is Knysna borehole water salty near the lagoon?
It can be. Properties on Leisure Isle and around the estuary margins sit close to tidal water, so raised chloride, sodium and conductivity are realistic and should be measured.
Heavy abstraction near the water can worsen it over time, which is a reason to operate within a tested sustainable rate.
Is a borehole worth it purely for water security?
For many Knysna properties that is the main reason rather than irrigation savings, and it changes the design. Storage needs sizing for a genuine outage rather than for a daily irrigation peak.
Think also about power: a booster pump will not run in an outage unless it has an alternative supply.
What yields can Knysna properties expect?
Variable, because the ground is folded Kaaimans rock where water occupies fractures rather than being spread through the formation. Holes that intersect structure do well; those that miss do not.
Yield testing after drilling gives the sustainable rate, and that figure rather than the drilling-day flow should drive the system design.
Do I register with Knysna Municipality?
Yes, local registration and by-law conditions are Knysna Municipality's rather than the City of Cape Town's.
Abstraction beyond reasonable domestic use may additionally require registration or authorisation from the Department of Water and Sanitation.
DRILLING IN KNYSNA?
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