Rising municipal costs, water restrictions, and failing infrastructure have seen more businesses and homeowners opting for boreholes. Drilling offers independence and a reliable supply, but an important question often gets overlooked: Is borehole water safe to drink? The short answer is: not always.
While groundwater can be clean, its safety depends on location and surrounding land use. We at Inyati Drilling and Mining would like to explain the importance of proper testing and treatment options, ensuring your water is safe to use.
Why Borehole Water Isn’t Automatically Safe
There is a common belief that underground water is naturally filtered and therefore pure. In reality, borehole water in South Africa varies significantly.
- Environmental Factors
Natural minerals and environmental factors have a direct impact on the quality of the extracted water. Common naturally occurring contaminants include iron and manganese, which can stain fixtures and affect flavour, as well as nitrates and fluoride, which may pose health risks at high levels. Microbiological contamination is another concern, especially E.coli, which indicates possible sewage or animal waste intrusion.
- Location
Properties near agricultural areas may experience fertiliser and pesticide runoff seeping into groundwater. In regions like Gauteng, industrial activity and historical mining can introduce heavy metals and other pollutants into boreholes. This makes proper assessment essential before using it as a drinking source.
How to Get Your Water Tested
Testing is widely available through accredited SANAS laboratories. The process usually involves collecting a sample in a sterile container and submitting it for analysis. Depending on the scope of testing, results are typically available within a few days. Costs vary depending on the type of tests. Although this may seem like an added expense, it is a crucial investment in health and safety.
Making Sense of Your Water Report
The results from the test need to be evaluated against South African drinking water standards. SANS 241 defines the acceptable limits for physical, chemical, and microbiological parameters in drinking water. If your water meets these guidelines, it is considered safe for human consumption. If not, the report will indicate which contaminants exceed safe levels, helping guide the appropriate treatment solution.
Treatment Options
Borehole water treatment depends on the specific contaminants identified during testing. There is no one-size-fits-all system, and solutions are often combined for the best results. Here are some typical options:
- Filtration systems are commonly used to remove sediment, iron, and manganese.
- UV sterilisation is effective against bacteria and viruses, making it a popular choice for microbiological safety.
- Reverse osmosis systems provide a high level of purification by removing dissolved salts, heavy metals, and nitrates.
How Often Should Your Water Be Tested?
For drinking purposes, annual testing is recommended at a minimum, with more frequent checks if there are changes in taste, colour, or odour. Irrigation systems typically require less frequent testing, while water used for livestock should be tested regularly to prevent health issues. Properties in high-risk areas, such as agricultural or mining regions, should monitor potable borehole water more frequently to ensure ongoing safety.
Ethical Borehole Drilling Practices
At Inyati Drilling and Mining, we do our utmost to ensure that your borehole water delivers a reliable, sustainable supply while preserving the delicate balance of the environment. We understand that if not managed correctly, borehole drilling activities can disturb sensitive ecosystems and increase the risk of groundwater contamination. We are recognised as industry leaders, with a strong reputation for excellence across geotechnical, environmental, mining exploration, and water resource drilling sectors. For the most efficient method of groundwater extraction, consult with our team.