In this paper, the results of statistical analysis of then years water quality data of Tamis river at the Romanian-Yugoslav border ("Jasa Tomic" Control Station) are presented. Following changes of analyzed water quality parameters at the Romanian-Yugoslav border a strong trend of deterioration has been observed during analyzed period. Because of periodical accidentally high organic content (COD, BOD) and concentration of ammonia and organic nitrogen in river water, it is concluded that upstream discharging of farm waste waters was the main reason of deterioration of water quality along the Yugoslav part of Tamis river.

Agriculture is critical to the economies of developing countries. It is the basic source of food supply and a major contributor to economic development. But there is a cost. Today, agricultural water pollution undermines economic growth and threatens the environmental and physical health of millions of people around the world. The annual social and economic costs of agricultural water pollution could reach trillions of dollars. Yet the issue receives scant attention in global research and debate.

La reduction des emissions d'ammoniac pour atteindre des objectifs environnementaux tels que stopper la diminution de la superficie des ecosystemes non proteges contre l'acidification et l'eutrophisation va occuper une place de plus en plus importante dans la strategie de lutte contre la pollution. En raison de la reduction des emissions d'oxydes de soufre et d'azote operee au cours des 20 dernieres annees dans le cadre de la Convention sur la pollution atmospherique transfrontiere a longue distance, il est fort probable qu'en 2010 c'est l'ammoniac qui contribuera le plus aux emissions gazeuses responsables de l'eutrophisation et de l'acidification. D'ou l'importance de prendre des maintenant des mesures efficaces contre ce polluant, et ce a l'echelle continentale

As part of the Canadian Great Lakes Action Plan, the transport and effect of non-point source agricultural contaminants in wetlands were evaluated. Due to the broad scope of this study, the abilities of many individuals with different domains of expertise were employed. Stages of the study reported here include: 1) Survey of cropping and pesticide/fertilizer practices of farms in the selected watersheds; 2) Sampling and analysis of creek water and sediments for pesticides and other parameters; 3) Study of the reversible "loss" of pesticides by adsorptive and diffusive interaction with sediment particles; 4) Investigation of the effect of the agricultural contaminants on macrophytes and invertebrates. Among the findings of this work were the detection of some pesticides years after their last use as well as the presence of microorganisms, in all creek sediments tested, capable of rapidly and completely mineralizing atrazine.