STATISTICAL EVALUATION OF DATA ON THE POLLUTION OF THE PRUT RIVER WITH AMMONIUM NITROGEN

Abstract

This paper analyzes the pollution of the Prut River with ammonium nitrogen (NH₄⁺) during the period 2019–2021, focusing on exceedances of the maximum allowable concentration (MAC) of 0.2 mg/L. The analyzed data comes from measurements taken in various localities along the river. The results indicate constant pollution with significant exceedances of the MAC, the highest measured concentration being 3.85 mg/L. Descriptive analysis reveals an asymmetric distribution, with extreme values raising the average to 0.8456 mg/L. The 2019–2021 period was chosen because this interval recorded significant MAC exceedances. Urban localities, such as Leova and Lipcani, show the highest concentrations, and are correlated with intense human activities. The conclusions emphasize the need for urgent action to reduce pollution and protect aquatic ecosystems and public health.