Abstract
This study focuses on evaluating the effectiveness of "Silver Aqua" portable filters provided by an American charitable foundation for drinking water purification. Water samples were collected from wells in the Shostka territorial community. An analysis of groundwater samples was conducted before and after purification using portable filters. The study examined the concentration of common contaminants such as nitrates and Escherichia coli (E. coli). It is known that recently, the quality of groundwater has significantly deteriorated due to the infiltration of waste from agro-industrial and chemical facilities into the soil as a result of military actions. Therefore, the use of portable filters by local residents and especially by military personnel can help prevent poisoning, infections, and chronic diseases.
The methods of analysis included the photocolorimetric method for nitrate determination using sodium salicylate and a rapid test method for detecting E. coli. The results confirmed the effectiveness of the portable filters in removing this group of pollutants.