What is test pumping?
Test pumping measures how much water a borehole can reliably produce — the data you need for pump size, storage design, and long-term performance.
Drilling a borehole and finding water is only part of the job. The next question is more important: how much water can the borehole reliably produce? This is where test pumping comes in.
Test pumping is the process of pumping water from a newly drilled borehole for a controlled period while monitoring its performance. Specialists record important measurements such as the pumping rate, water levels, drawdown, and recovery of the borehole after pumping stops. Those figures belong in every complete borehole cost plan, not as an optional add-on after the rig has left.
Why first flow is not enough
Why does this matter? A borehole may produce a strong flow when first drilled, but that does not automatically mean it can sustain that flow every day. Pumping beyond the capacity of the groundwater source can cause problems and may affect the long-term performance of the borehole. Skipping this stage is one reason the cheapest quotation can lead to mismatched equipment — and later to unexplained yield decline.
What the results are used for
The results of the test help determine the appropriate pump size and the amount of water that can reasonably be extracted. They also provide useful information when designing storage tanks and towers, irrigation systems, or other water infrastructure.
Test pumping data also informs solar borehole and borehole solarization sizing — because panel capacity must match the real power demand of the pump at your site's yield and depth.
For a farmer, developer, homeowner, or institution investing in a borehole — whether in Nairobi or elsewhere in our service network — these figures are valuable because they replace assumptions with actual performance data.
Not an optional extra
Test pumping may happen after the drilling rig has left the site, but it should not be treated as an optional extra. It is an important step in understanding what your new borehole can actually deliver — and in protecting the savings you expect when a borehole is planned to cut recurring water costs.
Powerwell includes test pumping in our structured borehole drilling process and uses the results as the foundation for every equipping installation. If you have an existing borehole that was never tested, we can assess it before pump replacement or solarization.
Request a quote or contact us to arrange test pumping for a new or existing borehole.