ASSESSING OF WATER QUALITY POLLUTION INDICES FOR HEAVY METAL CONTAMINATION. A STUDY CASE FROM MEDIAS CITY GROUNDWATERS

Three documented methods: Contamination index (Cd), the Heavy metal potential index (HPI) and the Heavy metal evaluation index (HEI) were evaluated for their suitability for contamination monitoring of underground water (water wells) from Medias. In addition, ions and physico-chemical analysis were elaborated. Results show that the concentrations of heavy metals found in the wells from Medias are below the permissible levels of drinking water quality standards. The data have been used for the calculation of Cd, HPI and HEI. All seven samples were classified as low using the Cd, HPI and HEI, whereas nitrogen compounds (nitrate, nitrite and ammonia) exceed the maximum admissible concentration, salinity as well (0.7‰ for F2, F3, F4, F5 and F7, while the MAC is established at 0.1‰, EPA). As a short conclusion, water samples do not present heavy metal pollution, furthermore there is an organic pollution, regarding nitrogen compounds and salinity