Healthy water is water that does not contain substances that have a negative impact on the human body. Drinking water is for the needs of its population, and the quality of the water must be at a high level in order to prevent any potential danger that would harm human health. It is necessary to properly and continuously conduct water analysis and check the correctness of the system for chemical, biological and physical water treatment. In this way, the danger of the appearance of BTEX compounds in the water is avoided. Volatile aromatic hydrocarbons (BTEX) are a group of organic compounds characterized by high volatility and the presence of one or more benzene rings in their molecular structure. These compounds are significant due to their wide application in industry, presence as environmental pollutants and potential health impact. Effective management and regulatory measures are essential to reduce their release and mitigate associated risks. A technique called chromatography is used to determine the presence of BTEX compounds. It separates, identifies and quantitatively determines the chemical components in water. The method used to determine BTEX compounds is gas chromatography. This work aims to determine the presence of benzene, which is the main representative of BTEX compounds in drinking water. They are determined by gas chromatography using MS and FID detectors.