Water quality plays an important role for every sustainable social and economic system, as well as for maintaining human health. This study, carried out during 2022–2023, has as its main objective the physical–chemical and microbiological analysis of some underground water resources (two boreholes and a spring) with a natural mineral load from three areas in Bihor County (Romania), and the impact of their consumption on people’s health. Therefore, six microbiological parameters and 17 physical–chemical indicators in three localities (Tămășeu, Sîntimreu, Pădurea Neagră) were analyzed. The results of the microbiological analysis indicate a type of water that respects the limits imposed by the legislation on natural mineral waters and potability. The physical–chemical indicators show that the hydrochemical type of the studied waters is predominantly bicarbonate, in association with calcium, magnesium, and sodium cations. The residents’ perception on water quality and the effect on people’s health was assessed through a questionnaire (23 items) addressed to the population of the three villages and neighboring localities. The results showed that the mineral waters from Sîntimreu and Pădurea Neagră are used frequently. Many respondents consider the local mineral waters as without quality-related problems and with beneficial effects regarding acute or chronic gastrointestinal conditions, such as gastritis, gastric ulcers, flatulence, or liver diseases.

The present study aimed to evaluate the efficacy of two filtration media—Rupea natural zeolite (ZNR) and Turbidex—in reducing the pollutant load of wastewater from agro-zootechnical units. Both media were tested under identical operational conditions to explore their potential for sustainable wastewater valorization with minimal environmental impact. Results showed that ZNR exhibited higher adsorption rates for nitrites, nitrates, and ammonium, whereas Turbidex achieved greater retention for COD, total suspended solids (TSS), and turbidity. Filtration through both zeolitic media effectively reduced microbial loads, as indicated by the elimination of coliform bacteria and enterococci, along with a significant decrease in heterotrophic plate counts at 22°C and 37°C. These findings demonstrate the potential of small-scale zeolite filtration systems as eco-friendly solutions for agro - zootechnical wastewater treatment.