Borehole Drilling in Nairobi: Survey, NEMA and WRA Permits, Drilling and Equipping

A borehole is a permit process with drilling attached

The drilling is the straightforward part. What goes wrong on Nairobi boreholes is almost always paperwork or the pump: a hole drilled without a WRA permit and a NEMA licence is illegal, cannot be regularised easily, and becomes a problem the day you try to sell the property.

We do not put a rig on site until both are in hand.

The sequence

1. Hydrogeological survey. A licensed hydrogeologist sites the hole and estimates depth and yield. This report is also what the permit application is built on.
2. NEMA licence and WRA permit. Both are quoted at survey, separately from drilling, so you can see exactly what is regulatory cost and what is our work.
3. Drilling. Nairobi and Kiambu are largely clay and weathered rock over volcanics. Depths commonly run 150–250m.
4. Casing and gravel packing, then development until the water runs clear.
5. Test pumping to establish real yield, not the driller’s optimistic estimate.
6. Equipping: pump sized to the yield and the tank height, control panel, rising main, and the changeover if you are running solar or a generator.

What determines the cost

Depth is the main driver, and depth is geological rather than negotiable. Nairobi clay drills faster and cheaper than Rift Valley igneous rock. Beyond that: casing depth, whether you need a booster set, and how far the tank sits from the head.

Dry holes and low yield

They happen. A survey reduces the risk substantially but does not remove it, and any driller who guarantees water before drilling is selling something. We tell you the survey’s confidence level before you commit, and what happens commercially if the yield comes in low.