Professional Well Testing Services are an essential part of groundwater development because they determine whether a completed borehole can provide a reliable and sustainable water supply. Bestcare Borehole Drilling provides comprehensive well testing solutions designed to establish borehole yield, aquifer performance, water-level behaviour and other technical characteristics required for proper pump selection and groundwater management.
A borehole may encounter water during drilling, but the presence of groundwater alone does not confirm that the well can sustainably meet the intended demand. Proper testing provides measurable information that helps property owners, developers, institutions, farmers and commercial water users make informed decisions before investing in permanent pumping equipment.
What Is Well Testing?
Well testing is the systematic assessment of a completed borehole to determine how it responds to pumping. The process involves measuring water levels, pumping rates and recovery behaviour over a specified period.
The information obtained can help determine:
- Borehole yield and sustainable abstraction rate
- Static water level
- Pumping water level
- Drawdown
- Recovery rate
- Aquifer response
- Borehole efficiency
- Appropriate pump capacity
- Potential interference with nearby wells
- General suitability of the borehole for its intended use
In Kenya, the Water Resources Authority (WRA) provides groundwater management and monitoring functions and has developed codes of practice covering groundwater development, including borehole pumping tests.
Why Professional Well Testing Is Important
Professional Well Testing Services provide technical information that cannot be reliably obtained simply by observing water flowing from a newly drilled borehole. A borehole may initially produce substantial water but experience significant drawdown when pumped continuously.
Testing helps establish whether the groundwater resource can support the proposed application.
For example, domestic water requirements are generally different from those of a large farm, school, hotel, hospital, factory or commercial development. The pumping test results can therefore be used to match the groundwater supply with actual demand.
A properly conducted test can also help prevent:
- Installing an oversized pump that causes excessive drawdown.
- Installing an undersized pump that cannot meet demand.
- Over-abstraction of the aquifer.
- Premature pump failure.
- Inefficient operation of the borehole.
- Poor long-term groundwater management.
Types of Well Testing
Bestcare Borehole Drilling can undertake different forms of testing depending on the condition of the borehole and the objectives of the investigation.
1. Constant-Rate Pumping Test
A constant-rate pumping test involves extracting groundwater at a predetermined and constant discharge rate while monitoring changes in the water level.
This is one of the most important tests for determining aquifer behaviour and borehole performance.
Under Kenya’s Water Resources Regulations, a borehole or well intended to be equipped with a motorised pump is subject to test pumping. The regulations specify a continuous constant-rate pumping test of not less than 24 hours and recovery of not less than 20 hours, unless otherwise stipulated by the Authority.
2. Recovery Test
After pumping stops, groundwater levels begin to recover toward their original static level. Technicians record this recovery over time.
The recovery data provides additional information about aquifer characteristics and the ability of the groundwater system to replenish the borehole after abstraction.
3. Step-Drawdown Test
A step-drawdown test involves pumping the borehole at progressively increasing rates. Water-level changes are measured at each stage.
This can help distinguish aquifer-related losses from well construction and borehole-efficiency losses and can assist in identifying an appropriate operating rate.
4. Static Water-Level Measurement
Before pumping begins, the static water level is measured. This provides a baseline against which subsequent drawdown and recovery measurements can be compared.
Our Well Testing Process
Professional Well Testing Services should follow a systematic procedure rather than simply pumping water from the borehole and estimating its capacity. Bestcare Borehole Drilling follows a structured testing approach.
Borehole Inspection
The borehole is first inspected to establish its condition and readiness for testing. Information from the drilling and construction records is reviewed, including depth, casing, screened sections and other completion details.
Equipment Installation
Appropriate pumping equipment, flow measurement devices and water-level monitoring equipment are installed. The equipment must be suitable for the expected borehole depth and discharge rate.
Baseline Measurements
Static water level is measured before pumping. Other relevant observations may also be recorded to establish baseline conditions.
Pumping
The borehole is pumped according to the selected test programme. The discharge rate is monitored throughout the test to ensure that the required pumping conditions are maintained.
Water-Level Monitoring
Technicians record water levels at specified intervals. These measurements show how rapidly the water level changes during pumping and how the borehole responds to continued abstraction.
Recovery Monitoring
Once pumping stops, water-level recovery is monitored. The recovery period is important because it demonstrates how quickly the borehole returns toward its pre-pumping condition.
Data Analysis
The collected measurements are analysed to determine borehole performance, drawdown, recovery behaviour and other relevant groundwater parameters.
Technical Reporting
The final results are compiled into a technical report containing relevant measurements, observations, test conditions and recommendations.
Information Obtained From a Well Test
A comprehensive test report can contain several important parameters.
| Parameter | What It Indicates | Importance |
|---|---|---|
| Static Water Level | Water level before pumping | Establishes baseline |
| Pumping Water Level | Water level during abstraction | Indicates operational behaviour |
| Drawdown | Reduction in water level during pumping | Helps assess pumping impact |
| Recovery | Water-level restoration after pumping | Indicates recharge response |
| Discharge Rate | Quantity of water being pumped | Helps establish borehole yield |
| Test Duration | Length of pumping and recovery | Supports reliable assessment |
| Pumping Rate | Actual abstraction rate | Helps determine operating capacity |
| Borehole Efficiency | Performance of the well structure | Helps identify construction losses |
| Recommended Yield | Suitable operating abstraction rate | Supports sustainable use |
| Water Quality Data | Chemical and microbiological characteristics | Helps determine suitability for use |
Pump Selection After Well Testing
One of the major benefits of Professional Well Testing Services is that the results can guide pump selection.
Selecting a pump solely on borehole depth can lead to poor performance. Pump sizing should consider factors such as:
- Borehole depth
- Static water level
- Dynamic water level
- Required discharge
- Total pumping head
- Storage tank location
- Pipeline distance
- Elevation
- Intended water demand
- Available power source
The objective is to select equipment capable of meeting demand without unnecessarily stressing the borehole.
Well Testing and Water Quality
Well testing primarily evaluates the hydraulic performance of the borehole, while laboratory water analysis evaluates water quality. Both can be important before a borehole is commissioned for domestic, institutional, agricultural or commercial use.
Water Resources Authority laboratory services include chemical and microbiological water analysis for various applications.
Bestcare Borehole Drilling can coordinate the appropriate water-quality assessment alongside borehole performance testing where required.
Compliance and Borehole Documentation
Proper documentation is an important component of groundwater development. Kenya’s regulatory framework requires completion information to be submitted to the Water Resources Authority, including the applicable borehole completion record and completion certificate. WRA also evaluates groundwater applications and supporting documentation as part of its permitting process.
Using qualified professionals helps ensure that testing and reporting are undertaken in accordance with applicable technical and regulatory requirements.
When Should a Borehole Be Tested?
Professional Well Testing Services are particularly appropriate after drilling and borehole completion, before permanent pump installation and whenever the performance of an existing borehole needs to be reassessed.
Testing may also be useful when:
- Borehole output has declined.
- A pump is being replaced.
- Water demand has increased.
- The borehole has been unused for an extended period.
- There are concerns about excessive drawdown.
- A new abstraction rate is being considered.
- The borehole is being evaluated for commercial or irrigation use.
Why Choose Bestcare Borehole Drilling?
Bestcare Borehole Drilling approaches well testing as part of an integrated groundwater development process rather than as an isolated pumping exercise. The service can be coordinated with borehole drilling, casing, development, pump installation, water storage and groundwater management requirements.
Our Professional Well Testing Services are designed to provide dependable technical information for property owners and developers who need to understand the actual performance of their groundwater source.
From preliminary assessment and equipment installation to pumping, monitoring, recovery analysis and reporting, each stage is handled with attention to accurate measurements and practical recommendations.
A properly tested borehole provides a stronger basis for pump selection, water-storage planning and sustainable groundwater abstraction. If you have a newly drilled borehole or an existing well whose performance needs to be established, Bestcare Borehole Drilling can provide Professional Well Testing Services tailored to the borehole’s construction, intended use and groundwater conditions.