FAQ

• Electric pump: lower upfront cost, but you pay electricity bills, risk power outages and higher running cost.

• Solar pump: higher upfront, but very low running cost, great for remote/off-grid locations, and strong long-term value if you use a lot of water or rely on the system often. One source notes solar systems are increasingly popular in Kenya due to high solar potential.
  When comparing, consider total lifecycle cost (upfront + running + maintenance) and reliability in your location.

Yield depends on the aquifer. Surveys and test pumping help estimate. But no contractor can guarantee infinite water – yield may vary. It’s important to ask for yield testing and obtain documentation. Some permits from WRA limit the abstraction rate.

Yes — the cost per metre varies by region due to geology and access. For example, in some counties the cost ranged KES 6,500-9,500/m depending on rock hardness and other factors.

Mobilisation (moving rig, water tanks, crew to site) is an often-overlooked cost, especially for remote or poorly accessible sites. Mobilisation may cost KES 20,000-50,000 or more.

Factors include geology, depth, water chemistry (corrosiveness), budget and performance. PVC is cheaper but may not hold up as well in aggressive or unstable formations. Steel is stronger/costlier.

Possibly — some components (e.g., storage tanks, piping) may be phased. But you should still complete legal drilling, casing, yield test and permit work. Delaying critical parts (pump) means you won’t fully benefit until installation. One article cautions that boreholes must be properly completed to avoid water loss.

Drilling without proper approvals (WRA permit, NEMA approval) may result in legal action, fines, and possibly the borehole being sealed at your cost.

Yes. Especially if water is for domestic use (drinking, cooking) or supplying multiple users. Tests check for bacteria, chemicals, salinity, hardness etc. Many quotes include lab fees for these tests.

With proper construction and maintenance, a borehole can last several decades (20-50 years or more) although components (pumps, controls) may need replacement periodically.

Hidden costs may include: extra casing for unexpected formations, deeper drilling if the water table is lower than expected, site access preparation, pump upsizing, storage tanks and pipes, delays due to permits.

Yes — but the design, capacity, abstraction permit and infrastructure will differ depending on use. Commercial/irrigation use often has stricter regulations (e.g., full EIA).

Yes. Maintenance includes:

• Annual servicing of pump, pipes, controls.

• Periodic water quality testing (especially if used for drinking).

• Checking casing, wellhead seal, and abstraction limits.

• Budgeting for replacement parts (pump lifespan may be 7-12 years for electric, longer for solar)

If the borehole yields insufficient water, you still incur the costs of drilling, casing and mobilisation. It’s therefore important to have the survey and ensure the contractor provides guaranteed yield or contingency plan. One article stresses this risk.

Yes it is highly recommended (often required) to perform a hydrogeological or geophysical survey to identify the best location, expected yield, depth and avoid dry holes.
This upfront cost (e.g., KES 50,000-80,000) can save a lot later by reducing risks.

Several key factors:

• Geological conditions (rock vs soft soils) – harder rock increases cost.

• Depth of borehole – more metres means more cost.

• Location/accessibility – remote sites increase mobilisation and transport costs.

• Casing material (PVC vs steel) and diameter.

• Pump type and size, storage/tank systems.

• Hidden costs like extra casing, site preparation, testing.

Depth varies widely depending on location, geology and water table. Many boreholes might range 50 m to 250 m or more.
In hard rock areas or arid zones water table may be deeper, increasing cost and complexity.

• Electric submersible pumps rely on grid electricity (or a generator) to draw water from the borehole. They generally have lower upfront cost but incur ongoing electricity and maintenance costs.

• Solar pumps use photovoltaic (PV) panels to power the pump. They have higher initial investment but very low running costs, and they’re ideal in off-grid or unreliable-power areas.
  For instance, one source notes that solar pump systems are costlier upfront but eliminate electricity expenses and provide reliability in remote locations.
  Choosing between them depends on your electricity reliability, usage, depth of borehole, water yield and budget.

Several regulatory approvals apply:

• You must obtain a permit from the Water Resources Authority (WRA) for groundwater abstraction.

• In many cases you require an environmental impact assessment (EIA) and approval from the National Environment Management Authority (NEMA).

• Local county governments may also require “no objection” letters, site clearance, and additional permits.
  Failure to comply can lead to penalties or being required to seal the borehole.

The actual drilling process (once everything is ready) may take 3-7 days for a typical residential borehole under favourable conditions.
However, the total project time including surveys, permits, mobilisation, drilling, casing, testing and pump installation may stretch over several weeks to a month or more.
Delays often arise from permit processing, site accessibility, geology (hard rock) or weather conditions.

The cost depends heavily on depth, geology, location, permits and equipment. For example, drilling alone is often quoted at around KES 6,000–9,000 per metre in many Kenyan counties.

When you include hydrogeological surveys, casing, pump installation and storage/distribution, typical total costs for a residential borehole may reach KSh 1 million+ (about KES 1m to 3m or more) depending on complexity.

It’s essential to get a detailed quote and understand what’s included (e.g., casing, pump, tank, quality testing).