The contaminations problem of surface and depth groundwater sources with various chemicalsubstances in the Banat Basin Area represents a topical issue of large actuality.The importance that isgiven to the monitoring of groundwater quality is derived from large share that usefull water from theHydrographic Basin Bega-Timis are feeds from these sources. In the centralized water supply systems,the total water requirement for the population needs provided from medium and deep drillings, isrequired to ensure a good chemical status so for the benefit of human health and also for theenvironmental quality in general. This paper has in view the quality of groundwater in the year 2008,2009 from I, II hydrogeological drillings also from the freatic layer pollution. and through deep drillingsituated in the Bega-Timis River Basin. The samples frequency from drillings have done according to themonitoring program collection made in periods of high rainfall in spring and drought period(summer-autumn). The analysised colected samples was done in to the Water Quality Timişoara Laboratory fromthe Banat Basine Waters Administration being determined the physical-chemical indicators of the Ionicbalance and the specific pollution indicators of that area: temperature, pH, conductivity, fixed residue,CCO-Mn, Na + , K + , Ca 2+ , Mg 2+ , Fe 2+ , Mn 2+ , Cl - , SO 42- , PO 43- , HCO 3- , NO 2- , NO 3- , NH 4+ , phenols andother indicators as HG 351/2005 (Pb, Zn, Cu, Ni). The quality of groundwater aquifer characterizationand establishment of critical areas, has in view the comparison of determined indicators values with themaximum admitted limits of Law 311/2004 (amending and completing Law No. 458/2002 on the qualityof drinking water). The evolution of groundwater quality from Bega-Timis River Basin is positive for theanalised period, the most executed drillings in to aquifer freatic layer shows an improvement of thephysical-chemical indicators, even are registered local speed at least one indicator of water qualitycharacterization. The water quality into the deep aquifer layer, we can conclude that this source of watermaintains good chemical status.

surface water, depth water, hydrogeological drillings, physical-chemical indicators, the maximum admited limits

Presentation: oral