During the monsoon, many families in Kerala continue to use borewell water for drinking, cooking and other daily needs. The water may look clear and taste normal, so it is easy to assume that everything is fine. But that clear glass of water may contain bacteria, chemicals or other contaminants that you cannot see, smell or taste.
Heavy rainfall can increase the risk of contamination when polluted surface water, sewage, waste or other contaminants enter groundwater pathways. WHO notes that microbial contamination from faecal sources is one of the greatest risks to drinking-water safety, while groundwater can also contain naturally occurring chemicals such as arsenic and fluoride.
So, is borewell water safe during the monsoon?
The honest answer is: Borewell water is not automatically unsafe during the monsoon, but heavy rainfall, flooding and nearby sewage or drainage can increase contamination risks. The only reliable way to know whether your borewell water is suitable for drinking is through laboratory water quality testing.
Borewell water comes from underground sources, but that does not automatically mean it is protected from contamination. During periods of heavy rainfall, water moves through soil and different layers of the ground. If there are nearby septic tanks, drainage systems, waste disposal areas, agricultural activities or other contamination sources, pollutants may enter groundwater.
This does not mean that every borewell becomes unsafe during the monsoon. It means that water quality can change and testing helps you know what is actually happening with your water source.
What Problems Can Contaminated Borewell Water Cause?
The biggest concern is that contaminated water may not show obvious warning signs. It can look perfectly normal while containing harmful microorganisms or chemicals. Microbiologically contaminated water can contribute to illnesses such as diarrhoea, dysentery, typhoid and other waterborne diseases.
Depending on the source and local conditions, groundwater can also contain substances such as:
Heavy monsoon rains trigger a surge in Shigella infections (shigellosis) by causing waterlogging, flooding and the contamination of open wells and drinking water sources. In regions like Kerala, active monsoon surges have led to hundreds of confirmed cases and localized health alerts due to the bacteria's extremely low infectiousness.
Essential Borewell Water Tests During Monsoon
If you use borewell water for drinking, a basic water quality test is a good starting point. Based on the situation, a laboratory may recommend additional tests.
1. Microbiological Testing
Microbiological testing checks borewell water for microorganisms and indicators of faecal contamination, including total coliforms and E. coli. It is particularly important after flooding or heavy rainfall.
2. pH Testing
pH indicates whether water is acidic, neutral or alkaline. Changes in water chemistry can affect taste, corrosion and the suitability of water for different uses. However, pH alone cannot tell you whether water is safe to drink. It needs to be considered along with other water-quality parameters.
3. TDS and Electrical Conductivity
Total Dissolved Solids (TDS) indicate the amount of dissolved substances present in water. It can provide useful information about water quality, but it should not be treated as a complete safety test. A normal TDS value does not automatically mean that water is free from bacteria or harmful chemicals.
4. Nitrate Testing
Nitrates can enter groundwater from sources such as agricultural activity, sewage and waste. Testing can be especially useful when borewell water is being used for drinking and the surrounding area has potential sources of contamination.
5. Heavy Metal Testing
Depending on local geology and possible contamination sources, testing may be recommended for metals such as lead, arsenic, iron, manganese and other relevant elements.
6. Fluoride Testing
Fluoride can occur naturally in groundwater. While fluoride has beneficial uses at appropriate levels, excessive exposure can become a health concern.
When Should You Test Borewell Water?
Many people wait until the water becomes cloudy, develops an unusual smell or changes taste. That may be too late.Consider testing your borewell water:
Regular testing can also help you compare results over time and identify changes in water quality.
Can You Know If Borewell Water Is Safe by Looking at It?
No. Clear water is not necessarily safe water.
Some harmful microorganisms and chemical contaminants do not change the appearance, smell or taste of water. That is why professional borewell water testing is more reliable than depending on visual checks or home assumptions.
Why Choose a Professional Water Testing Laboratory?
A professional laboratory can analyse your sample using appropriate testing methods and provide a report that helps you understand the condition of your water.
If you are searching for a water testing lab in Kozhikode, choose a laboratory that can provide relevant chemical and microbiological testing based on your water source and intended use.
Professional water testing can help you:
The latest WHO drinking-water guidelines continue to emphasize a risk-based approach to water safety, from the source through to the consumer.
Do not panic and do not ignore the result. The right solution depends on what contaminant was detected and at what level. A laboratory report can help identify the problem, after which an appropriate water treatment or source-management solution can be considered.
or example, microbial contamination and excess minerals require different approaches. Installing a water purifier without first understanding the actual problem may not be the most effective solution.
Test first. Understand the problem. Then choose the treatment.
Don't Guess About Your Borewell Water, Test It!
Your borewell water may look perfectly clean while containing contaminants that cannot be detected by your senses. A simple water quality test can provide valuable information about what is actually present in your water and whether further treatment or action is needed.
If you are looking for a trusted water testing lab in Kozhikode, CoreValleys can help you take a more informed approach to water safety. From understanding water quality to identifying potential chemical and microbiological concerns, professional testing can give you the information you need to protect your home, family and daily water supply.
This monsoon, don't just trust your borewell water because it looks clean. Test it. Know it. Protect it.
