Why is it necessary to treat the water in our home instead of relying entirely on the water utility company?

Let’s start with what the water utility company does—and what it doesn’t do.

In theory, water utilities treat water at their drinking-water treatment plants and disinfect it, most often with chlorine or chloramines. At that point, it does meet the requirements of Ordinance No. 9 on the quality of water intended for drinking and household purposes. Unfortunately, in Bulgaria only about half of the water utilities operate a DWTP (drinking-water treatment plant). The other issue is that the water’s journey from the plant to your tap is long—sometimes tens of kilometers of pipes. Along this route, many things can happen:

• Aging water distribution network—In many Bulgarian cities, pipelines are decades old and made of materials such as steel, so‑called Eternit (asbestos‑cement) pipes, or even lead, which can release particles directly into the water.

• Secondary contamination—Cracks and leaks in pipes can allow the intrusion of soil microorganisms, nitrates, and heavy metals, especially during frequent water shutoffs.

• Residual chlorine and chlorinated by-products—Chlorine is necessary for disinfection, but when it reacts with organic matter, it forms so‑called trihalomethanes (THMs), some of which are carcinogenic.

• A building’s internal plumbing—Especially in older buildings, the pipes inside the apartment block or house are outside the utility’s control, for better or worse, and can be a major source of contamination if they are not replaced and flushed regularly.

And that leads to the question: What are we actually drinking from the tap? Even when standards are met, drinking water may contain:

• Heavy metals (lead, copper, iron, manganese).

• Nitrates and nitrites (especially where there is agricultural activity nearby).

• Microplastics.

• Pharmaceutical residues and hormones.

• Biological contaminants during breaks in the water supply network.

• Limescale and hardness (magnesium and calcium)—not harmful, but they damage appliances and worsen taste.

Long-term health risks

Drinking water with elevated levels of heavy metals or chlorinated by-products does not usually cause immediate symptoms, but long-term use is associated with a range of health harms.

The solution: home water treatment or stronger oversight?

Fortunately, home water-treatment technologies are more accessible and more effective than trying to enforce tighter control over the utility. Depending on local water quality, the following options can be used:

• Reverse osmosis (RO)—Home RO systems remove up to 99% of dissolved contaminants, heavy metals, nitrates, and microbiological contaminants; ideal for drinking water.

• Mechanical filtration—Adding an extra filter after the water meter removes suspended particles, rust, and sediment; essential as a pre-treatment stage.

• Activated carbon—An activated carbon filter installed after the water meter adsorbs chlorine and organic substances and improves taste and odor.

• UV sterilization—Kills bacteria and viruses without adding chemicals.

• Water softening systems—Devices that remove the minerals responsible for water hardness (calcium and magnesium), preventing limescale and protecting household appliances.

Additional benefits of home treatment (beyond health)

• Longer appliance lifespan—Washing machines, dishwashers, and boilers run more efficiently and last longer with soft, clean water.

• Savings from bottled water—A family that stops buying bottled water can save hundreds of euros per year.

• Better skin and hair—Soft water reduces dryness and irritation when washing.

• Better-tasting food and drinks—Water quality directly affects the taste of coffee, tea, and cooked food.

The most important question: what additional treatment do you need?

Before investing in a treatment system, it’s recommended to do a water analysis at an accredited laboratory. This will show exactly which parameters are out of range and will help select the right technology. Such analyses are offered by the Regional Health Inspectorates and by private laboratories at affordable prices.

Relying only on the water utility is understandable, but it isn’t enough. Adding your own treatment system is not distrust of the operator—it’s your responsibility for your family’s health and comfort. Ultimately, control over the water quality in your home is in each of our hands.