Will I get salty water?
Will you get salty water from your borehole? In Kenya, the answer depends on geology, depth, and location. Here is how to assess the risk before you drill.
One of the most common questions asked by prospective borehole owners in Kenya is: "Will I get salty water?" The answer depends largely on the geological characteristics of the area where the borehole is drilled — and it is a question worth answering before you commit your budget, not after the rig arrives.
Groundwater naturally interacts with rocks and minerals underground. In some regions, particularly parts of Kenya's arid and semi-arid counties, groundwater may contain higher levels of dissolved salts and minerals. This can affect the taste, suitability for domestic use, irrigation, or commercial applications.
Which areas are more likely to have saline water?
Coastal counties, certain parts of Kajiado, Machakos, and other ASAL regions can present higher salinity risk at specific depths. However, salinity is not uniform — two neighbouring plots can produce very different water quality depending on aquifer structure, fault lines, and depth to water.
This is why a desktop and field hydrogeological survey is essential. While no survey can guarantee exact water quality before drilling, it significantly improves decision-making and reduces uncertainty by identifying favourable drilling zones and flagging geological conditions associated with mineral-rich water.
Testing water quality after drilling
After drilling, water samples should always be tested by a certified laboratory. Water quality analysis determines whether the water is suitable for drinking, farming, livestock, or commercial use. Parameters typically tested include total dissolved solids (TDS), pH, hardness, nitrates, bacteria, and specific ions such as fluoride and iron.
If elevated salinity levels are detected, treatment options such as reverse osmosis, blending with other water sources, or selecting a different aquifer zone may be considered. The cost of treatment should be factored into your project budget from the start if your survey indicates elevated risk.
Planning reduces costly surprises
The best approach is to seek expert advice before investing in a borehole. Proper planning, professional surveys, and water quality testing help ensure you understand the potential water characteristics of your site and make informed investment decisions.
Every borehole is unique, which is why thorough assessment is essential before drilling begins. Contact Powerwell to arrange a site survey, or explore our services to see how we support clients from investigation through commissioning.