Are There Any Harmful Effects of Treated Water? Scientific Facts and Solutions

Nowadays, whilst many people rely on technology to access clean and safe drinking water, one question keeps echoing in their minds: Are there any risks associated with treated water? With the annual per capita supply of usable water in Turkey standing at around 1,519 cubic metres, our country is classified as a‘water-stressed’ region. This situation, whilst occasionally causing fluctuations in the quality of mains water, has made domestic water purification systems a necessity rather than a luxury. However, the desire for clean water has also sparked debates about whether purified water is suitable for the human body. Consumers, whilst seeking to avoid chlorine and heavy metals in water, are rightly questioning whether they are being deprived of minerals that are vital for their bodies. In this comprehensive guide, we will examine the question‘Is purified water healthy?’ in the light of scientific data, expert opinions and evidence-based statistics, and explore in detail how you can protect your health by choosing the right system.

Is Treated Water Healthy or Harmful?

To provide a clear answer to this question, we must first understand how water purification systems work. At the heart of modern water purification systems lies a technology known as ‘Reverse Osmosis’ (RO). Reverse osmosis is an extremely effective method that filters out harmful particles, chemicals and heavy metals by forcing water through a semi-permeable membrane under high pressure. So, is treated water harmful? When the technology is used correctly and supported by the right filters, treated water is absolutely safe and reliable.

However, there is also a scientific basis to why people find treated water unhealthy. The problem stems from the fact that reverse osmosis membranes are not selective. Whilst this membrane successfully blocks substances harmful to health, such as lead, mercury, arsenic and microplastics, it also filters out beneficial minerals naturally present in water—such as calcium and magnesium—which our bodies need, in equal measure. This results in the water becoming ‘demineralised’ (pure). Consequently, whether the treated water is healthy or not depends on whether the system reintroduces these minerals into the water after the purification process.

What Are the Harmful Effects of Treated Water and What Causes Them?

The use of systems that merely purify water without restoring it to its natural state may create certain drawbacks in the long term. The source of these problems is not water pollution, but rather the fact that the water is excessively purified (pure) and that equipment maintenance procedures are neglected.

Mineral Loss: Do Water Purifiers Remove Minerals?

The commonly held belief that ‘water purification systems kill the minerals in water’ is, in technical terms, a misnomer. As minerals are not living organisms, they cannot die; however, they are ‘removed’ from the water by being filtered out by the system. Reverse osmosis systems block 99 per cent of harmful substances, whilst also causing 90 to 99 per cent of beneficial minerals, such as calcium and magnesium, to be removed. If your system does not include a mineral replenishment unit as the final stage, the water you drink falls into the category of demineralised water. Consuming only demineralised water may lead to a reduction in the daily mineral intake required by cells and could disrupt osmotic balance at a cellular level.

A Drop in Water’s pH Level and the Consumption of Acidic Water

Another significant issue cited amongst the drawbacks of treated water is the disruption of the water’s pH balance. Natural spring waters generally have a pH level between 7.0 and 8.5—that is, neutral or slightly alkaline—thanks to the minerals they contain. However, when alkaline minerals (calcium, magnesium, potassium) are removed from the water following the reverse osmosis process, the water’s pH level drops to between 5.5 and 6.5, giving it an acidic character. The pH value of human blood lies within a very narrow range of 7.35–7.45. Consuming water with an acidic composition on a regular basis can lead the body to draw on its own mineral reserves (such as calcium in the bones) in order to maintain its acid-base balance. In the long term, this can trigger problems such as fatigue, a weakened immune system and accelerated cellular ageing.

Hygiene Risks Caused by Neglected Filters

One of the most tangible risks associated with treated water is user negligence. Research carried out by the Department of Public Health at Konya Meram Faculty of Medicine, along with similar academic studies, has shown that filters in domestic water treatment systems which are not replaced in good time can lead to serious microbiological contamination. Filters are designed to trap organic matter and bacteria in the water. However, a filter that has reached the end of its service life not only fails to perform its filtration function but also becomes an ideal, moist incubator environment for the bacteria it has trapped to multiply.

To mitigate this risk, it is essential that device maintenance is not neglected. For safe and healthy water consumption, water purification systems that undergo periodic maintenance carried out by specialist teams should be preferred. Regular replacement of filters not only preserves the taste of the water but also protects your family from dangerous pathogens.

Frequently Asked Questions and Concerns Regarding Health

Water is life, and its quality has a direct impact on our general health. For this reason, consumers have many questions about its effects on specific organs and bodily functions.

Does Treated Water Harm the Kidneys?

The kidneys are our body’s main filtration system. Consuming high-quality, clean water—free from chlorine, limescale, heavy metals and microplastics that may be present in tap water—is extremely beneficial for kidney health. This is because the kidneys expend far less energy filtering out harmful toxins and eliminating them from the body. However, the situation is different for patients with advanced chronic kidney disease. The electrolyte (mineral) balance in these individuals’ bodies is highly sensitive. As consuming fully purified (mineral-free) water may increase urine output and sodium excretion, patients with chronic kidney disease must always consult their specialist doctor regarding the consumption of purified water. For healthy individuals, mineral-enriched purified water is an excellent source of hydration that helps reduce the risk of kidney stones.

Does Treated Water Cause Osteoporosis?

The effects of consuming only demineralised (pure) water on bone health have long been a subject of debate in the scientific community. In a systematic review published by Sunardi and colleagues (2022) in the journal *Reviews on Environmental Health*, it was stated that there is 100 per cent consensus that the consumption of demineralised water alone is harmful to health. Although we obtain some of the calcium we need from food, the bioavailability (the rate at which it is absorbed by the body) of calcium from water is quite high. A lack of calcium in water may, over time, cause the body to draw on its own reserves. However, when remineralisation (the reintroduction of minerals into the water) is carried out using a high-quality mineral filter, purified water does not lead to osteoporosis; on the contrary, it becomes a safe drink that supports bone health.

Are There Any Risks to Children and Babies from Treated Water?

Calcium and magnesium are of vital importance for the bone development, neurological health and immune system of children during their growth and development. Using water that has been completely stripped of its minerals in baby formula or as part of children’s daily water intake may lead to mineral deficiencies in the long term. On the other hand, heavy metals such as lead, which may be present in tap water, can cause irreversible damage to children’s mental development. The solution to this dilemma is clear: a water filtration system is essential to protect children from heavy metals and chlorine; however, to support their development, this system must be equipped with a high-quality alkaline filter that adds calcium and magnesium.

World Health Organisation (WHO) Data and Expert Opinions

The approaches taken by scientific authorities regarding the use of treated water provide the clearest guidance on the subject. In its ‘Guidelines on Water, Sanitation and Health’ report published in 2005, the World Health Organisation (WHO) highlighted the potential risks of demineralised water. According to WHO data, calcium in drinking water has a protective effect against cardiovascular diseases at a concentration of 18 per cent, whilst magnesium has a protective effect at a concentration of 25 per cent. The WHO strongly recommends that drinking water contain a minimum of 10 mg of magnesium and 20 mg of calcium per litre.

Experts in our country also frequently address this issue. Medical authorities such as Associate Professor Dr Muhammed Keskin, a cardiologist, emphasise that magnesium is vital for the electrical conduction of the heart muscle and vascular health, and therefore stress that those using water purification systems must enrich their water with mineral filters. This is also a proven fact in terms of the EEAT (Experience, Expertise, Authority and Trustworthiness) standards; water lacking in natural minerals cannot be expected to provide a protective shield for heart health.

How Can I Protect Myself from the Harmful Effects of Treated Water?

All factors considered to be the harmful effects of treated water can be completely eliminated through the use of the right technology and responsible consumer behaviour. Your aim should not merely be to purify the water, but to restore it to its natural state, where it ‘nourishes and sustains life’.

The Importance of Using Alkaline and Mineral Filters

The definitive solution to preventing the harmful effects of demineralised water is to integrate alkaline and mineral filters into your system. Once the reverse osmosis process is complete and the water has been stored, it undergoes a final stage just before it flows from the tap. Alkaline and mineral filters naturally enrich the water by mimicking the structure of natural rocks (such as calcite and dolomite). This process (remineralisation) raises the water’s pH level to an alkaline value of 7.5–8.5, whilst restoring the calcium and magnesium essential for the body to the water. Alkaline water helps to neutralise acidic waste products in the cells and creates a powerful antioxidant effect.

The table below clearly summarises the composition and health benefits of different types of water:

Selection of NSF-Certified Devices and Regular Filter Replacement

Unregulated, untraceable and uncertified devices are one of the greatest threats to your health. The most reliable way to verify the reliability of a device and its filters is to check whether it holds NSF (National Sanitation Foundation) certification. NSF certification guarantees that the product does not release harmful toxins into the water, that the materials used are safe for human health, and that it actually delivers the purification performance it claims.

If you’re looking for a combination of style and health in your homes and offices, water dispensers with water filtration systems featuring NSF-certified components are the perfect solution. These premium systems minimise the risk of bacterial growth to zero, thanks to regular service reminders and guarantees on genuine spare parts, ensuring you always enjoy fresh, mineral-rich water.

Is it safe to drink water from a continuous water treatment system?

We’ve now come to the definitive answer to the much-discussed question: ‘Is it harmful to drink reverse osmosis water all the time?’ The answer depends entirely on the equipment you have and your maintenance habits. Drinking water continuously from systems that only have a ‘reverse osmosis’ filter and do not replenish the water with minerals may, in the long term, lead to health problems caused by mineral deficiency and acidity.

However, it is entirely safe and extremely healthy to drink water from devices that filter out heavy metals and chemicals flawlessly, and then use high-quality mineral filters to bring this water up to the alkaline level set by the World Health Organisation . Provided you choose the right brand, use certified filters and adhere to regular maintenance routines, water purification systems will not pose a risk to your health; rather, they will be your greatest source of life, protecting your body from toxins and nourishing your cells. Remember, good water is the key to a long and healthy life.