Borehole Drillers in Kenya

This is the first question, and it is not answered by the driller. A hydrogeologist surveys the site, maps the aquifer underneath it and marks the point to drill. The report tells you the likely depth and yield before anyone brings a rig.

Depth is what your site dictates and what everything else follows from. In much of the Nairobi metro water sits around 100m; in parts of Kajiado and Machakos you may be drilling 150m or more. That is why nobody can quote you honestly over the phone.

The drilling itself is quick, usually two to five days. The survey and the WRA and NEMA permits are what set your timeline, commonly four to eight weeks before a rig arrives. Plan on roughly two to three months from decision to water.

Then the borehole is tested to prove its yield in cubic metres per hour, the water is tested to confirm it is safe to drink, and a pump is sized to what the hole actually delivers. Ask for both certificates before the final payment.

Expect from about KES 645,000 for a shallow 50m borehole and around KES 980,000 for a 100m borehole drilled and fully equipped. The drilling itself runs about KES 6,700 per metre in stable rock and KES 15,050 per metre in loose ground.

Almost nobody buys a borehole twice, so those numbers are hard to sanity-check. A quote is really five purchases bundled together: the survey, the permits, the drilling and casing, the test pumping, and the pump. We publish each line at the market rate so you can see what you are paying for.

There are two ways to drill a borehole in Kenya and the difference is the biggest single swing in your bill. Air rotary blows the cuttings out with compressed air. It is fast, it is what most of the country needs, and it works wherever there is competent rock to hold the hole open. Mud rotary circulates a drilling fluid that holds the walls up while you cut, which is what loose, sandy or collapsing ground demands.

Air rotary runs about KES 6,700 a metre. Mud rotary runs about KES 15,050. That is not a markup, it is a different job: the drilling line alone goes from roughly KES 3,220 to KES 11,270 a metre because the work is slower, and the casing is heavier. On a 100m hole that difference is over KES 800,000.

You do not choose this. The survey does. Anyone who quotes you a method before looking at your ground is quoting a number they intend to revise once the rig is on site and you are committed.

Depth is what your rate multiplies by, so it matters more than the rate itself. Across the Nairobi metro, water is commonly reached somewhere near 100 metres. In much of Kajiado, Machakos and the drier counties, 150 metres or more is normal. Published industry figures put the usual national range at roughly 120 to 250 metres.

This is why a cheap per-metre rate in a deep county can cost more than an expensive rate in a shallow one, and why comparing two quotes on rate alone tells you almost nothing. A KES 6,500 metre at 180m is KES 1.17 million of drilling. A KES 8,000 metre at 90m is KES 720,000. The cheaper rate is the more expensive borehole.

Nobody can tell you your depth over the phone, and the ones who try are guessing with your money. The hydrogeological survey is what turns your site into a number.

This market runs on trust and very little verification, so here is what to actually ask for. First, the rig's Water Resources Authority permit, current and in the name of the company quoting you. An unpermitted borehole can be sealed, and that loss lands on you as the landowner, not on the driller who has moved on.

Second, a quote broken down line by line: mobilisation, drilling per metre, casing per metre, graveling, well development, test pumping, water analysis, and the pump as a separate figure. A single bundled number is how margin hides. Third, two finished boreholes in your county that you can go and look at, and the owners' numbers.

Fourth, the test pumping certificate and the water chemical analysis before the final instalment leaves your hands. Those two documents are the only proof of what you actually bought. A contractor who has done this properly will hand them over without being chased.

The arithmetic above is also the arithmetic of a bad quote. Casing is KES 2,269 of the KES 6,700 metre. Take the casing down a class, shorten the gravel pack, skip proper well development, leave the survey and permits off the sheet, and you can advertise a number nobody honest can match.

A threshold worth knowing: below about KES 5,000 a metre, casing has almost certainly been excluded or dropped to a thinner class, and a hole cased that way can collapse within eighteen to thirty-six months. You will not find out on the day. You will find out in year two, when the yield falls away or the walls come in, and re-drilling costs more than doing it once.

So when one quote sits far below the rest, the difference is almost never efficiency. It is something that has been removed from the hole and left in the quote.

The drilling is the capital cost, not the whole cost, and almost nobody tells you the rest before you sign. An electric pump adds to your power bill every month it runs, which is the running cost that makes solar worth the higher upfront figure on farms and irrigation. Pumps are consumables on a long timescale: they wear, and they get replaced.

Set against that, what you stop paying. A household on trucked water at KES 15,000 a month is spending KES 180,000 a year to be at the mercy of someone else's schedule. A rental block or a farm can be spending several times that. That is the number the borehole is competing against, and it is why the payback on a farm or a rental is usually a few years rather than a decade.

For a single household on a mains connection that actually works, the case is genuinely weaker, and we would rather say so now than sell you a hole you did not need.

Farms and irrigation are the clearest case: water is an input to income, and the supply has to be there when the crop needs it, not when the schedule allows. Rental blocks and gated developments are next, because tenants leave over water and a bowser bill scales with every unit you add.

Schools, clinics and institutions are drilling for reliability rather than savings, and the sums usually work anyway at that volume. Businesses that use water as a process input, from car washes to food handling, tend to find the payback is under two years.

Then there are households on the metro fringe, in Kitengela, Ruiru, Kikuyu, Ngong and Athi River, where the mains either has not arrived or arrives on a rota. That is the biggest group of people reading this page, and for them the honest test is simple: add up what you spent on water last year, and how many days you had none.

It is one of the most searched questions in this market, so it deserves a straight answer: not commercially. Boreholes do get funded by county governments, by NGOs and through community water projects, and those are allocated through those programmes rather than ordered by a landowner. If you own the plot and want your own supply on it, you are paying for it.

What you can do is share the cost. Neighbouring plots sometimes drill one borehole and split it, which changes the maths considerably and is worth raising with the people either side of you before you commit alone. Get the sharing agreement in writing, and put it against the title, because the borehole outlives the friendship.

The county table above is not a price list, it is a map of geology. Around Nairobi you are drilling through hard volcanic rock, phonolite and trachyte, which is slow on the bit and hard on equipment but stands up without much help once it is open. That is air rotary country, and it is why the metro rate is competitive despite the rock being difficult: there are more rigs here than anywhere else in Kenya.

At the coast the ground is coral limestone and sediment. Softer, faster, and more likely to need mud rotary to keep the hole from closing, with salinity to think about the nearer you are to the sea. In the Rift, volcanic ash and loose fill mean the same problem for a different reason. Out in Turkana and the northern counties nothing about the rock is the issue; the cost is getting a rig there at all, which is why it carries the highest published rate in the country.

So a rate is really a sentence about your ground, your depth and your distance from the nearest rig, compressed into one number. Two quotes that differ by KES 2,000 a metre are usually not competing on margin. They are describing different jobs, and only one of them has looked at your plot.

The dry hole is the one everyone fears and the rarest when a survey has been done properly, because the survey exists precisely to price that risk down. It still happens. Drilling is billed per metre whether or not water arrives, so ask what a dry hole costs you, and get the answer in writing before the rig moves.

More common is the disappointing hole: water, but not much of it. A borehole that yields half a cubic metre an hour is not a failure of drilling, it is what that aquifer had. This is why the test pumping certificate matters more than the depth certificate. It tells you what you can actually take out, day after day, and it is the number your pump must be sized against.

Then there is the slow failure, which is the expensive one. Thin casing, a short gravel pack, or well development skipped to save a day: the hole works on handover and starts silting or collapsing eighteen months later. By then the rig is three counties away. Almost every one of these traces back to a quote that looked like a bargain.

The last one is paperwork. A borehole drilled without the WRA permit can be sealed, and the enforcement lands on the landowner. The driller who told you not to worry about it is not the person who loses a million shillings.

Five questions, and you can ask them before anyone visits. What is your WRA rig permit number? Is your quote itemised per metre, and does it include the survey, the permits, the wellhead and the pump, or are those separate? What happens if the hole is dry? Is VAT included? Can I visit two boreholes you finished in my county?

You will learn more from how those are answered than from the price. A contractor who has done this properly answers all five without pausing, because they have answered them a hundred times. Hesitation on any of them is your signal.

When you send us your site, that is roughly the conversation we have in reverse: we ask what county the plot is in, what the water is for and what you expect to use, because those three things decide whether a borehole is even the right answer for you. Sometimes it is not, and we would rather tell you that at the enquiry stage than at the invoice.