Quality analysis of water samples from the snt "Zdorovye" well

This paper presents the findings of a comprehensive water quality assessment conducted on a well water source within the horticultural non-commercial partnership "Zdorovye" located in the city of Krasnoyarsk. A systematic analysis of key physicochemical and microbiological parameters was carried out over a three-year monitoring period (2023–2025). The evaluation was performed in accordance with the regulatory requirements of SanPiN 2.1.3684–21 and the guidelines established by the World Health Organization (WHO). The scope of the analysis encompassed the determination of pH, total hardness, iron (Fe), magnesium (Mg), nitrate ions (NO₃⁻), chloride ions (Cl⁻), sulfate ions (SO₄²⁻), total dissolved solids (TDS), permanganate oxidizability, as well as microbiological indicators including total bacterial count, total coliform bacteria, and E. coli. The results demonstrated a notable reduction in nitrate ion concentration from 92 mg/dm³ in 2023 to 80 mg/dm³ in 2025, indicating a positive trend in water quality improvement. Nevertheless, nitrate levels continue to exceed the maximum permissible concentration (MPC) of 45 mg/dm³. All remaining parameters were found to comply with established regulatory standards throughout the entire observation period. Total dissolved solids remained stable within the range of 460–480 mg/dm³, and no microbiological contamination was detected in any of the sampling periods. Despite the observed positive trends, the importance of continuous water quality monitoring is emphasized to mitigate potential public health risks. The authors underscore the necessity of regular water composition assessment, as elevated nitrate levels pose significant health hazards, including methemoglobinemia, increased carcinogenic risk, and thyroid dysfunction. Probable contributing factors to the observed nitrate reduction include changes in hydrogeological conditions, decreased agrochemical loading, and improved environmental awareness among the local population. The findings confirm the efficacy of implemented remedial measures and substantiate the need for continued systematic monitoring of groundwater sources.