Water quality in drainage canals system is under big influence of activities on surrounding agricultural land. In order to decrease transport and deposition part of plant protection chemicals and mineral fertilizers, vegetation belts with different shapes, characteristics and rules are possible to use. Besides the main purpose, this kind of belts are corridors for moving, but also place for living of wild plants and animals, what is increasing biodiversity. In that way, favourable conditions for organic agriculture in land reclamation area are possible to create.

Aquatic macrophytes are exceptional accumulations of heavy metals and they are very important in phytoremediation of the pollutants. The aim of the survey was to show according to content of heavy metals in aquatic macrophytes DTD (Danube-Tisza-Danube) canal complex, at localities under great human influence indicate the situation of chemical contamination these localities and to define test species, actually the ones that have the greatest accumulation. Plant material was prepared according to the Standard Methods for Examination of Water and Wastewater of the American Health Association. Analysis of heavy metals in the plant tissue samples was done by standard methods using atomic absorption spectrophotometry. The best accumulator of majority of heavy metals is Ceratophyllum demersum. The results show that mentioned species can be used for removal of heavy metals from water, what means that it has the ability of phytoremediation of pollutants.

Arsenic is very toxic element and great pollutants in the environment. In this work we determine the content of arsenic in sea water from different sampling points of Montenegrin coast (mouth of river Bojana, Valdanos, Bar port, earlier Bar, Platamuni, Tivat bay) in winter and spring period. The content of arsenic was determined by using hydride AAS technique (Perkin Elmer, model 3300). The results were compared with the literature data and standard reference materials (Sea water CASS-1 National Research Council Canada-NRCC).

In this paper there are presented the results of organic matter index, as dominant component of unsettled water of settlement, which after specified time locate into deeply karst underground appear on spring of river. Obtained results showed that into deeply karst underground has become to certain level of autopurification, which reflecting values of index this loading on the water of spring - river.

Since the water from the intergranular aquifer of Cemovsko Polje (Montenegro) represents an invaluable drinking water reserve, which can also be used for irrigation, the check up of the aquifer revealed that it is being infiltrated by pollutants from somewhere within the catchment area. The results have shown that the mentioned water from the intergranular aquifer (T3 and T4) is influenced by the agricultural activities in the area, leakage from the uncontrolled landfill of Podgorica, depending on the hydrological conditions, and, to a smaller degree, by the quality of the surface waterflows, with which it is connected.

During the research of the flora of the river Moravica methodology of ass. Scirpo-Phragmitetum, Koch 1926, subass. typhetosum latifoliae, Pignotti 1953, with differential typa Typha latifolia with related marshy plants was applied. The community is developed as small units in the lower flow of the river Moravica (the part flowing through the town Aleksinac), where the anthropogenic influences are significant due to the empting of the sewage and industrial polluted waters of the town Aleksinac. Many diffuse forms of pollution are also present, particularly in the form of illegal dumps. Waste waters represent serious load on the recipient river and influence qualitative and quantitative content of the phytocenosis. Ecological index of the community shows change in water quality and presence of organic substances (above all nitrogen compounds) in the water and the riverbed ass. Scirpo-Phragmitetum, Koch 1926, subass. typhetosum latifoliae, Pignotti 1953, which indicates the riverbed loaded with organic substances (mezotrophic plants, N=3.50)

In order to investigate the effects of wastewater from the Vrbas-Kula-Crvenka industrial basin on Grand Backa canal water quality, the water quality in the canal and the lateral canals which fall into the Grand Backa canal was examined, along with industrial water quality for ten of the most important polluters of those canals. A significant deterioration of Grand Backa canal water quality downstream of the lateral canals I-61 and I-64 was detected, as a consequence of waste water emission from the Vrbas-Kula-Crvenka industrial basin polluters. Data analysis has shown that two sugar factories are the heaviest polluters in the examined industrial basin.

Sea urchin, Paracentrotus lividus belongs to Echinoderms and has wide distribution as well in Meditarranean Sea as in the Adriatic Sea. It is very appreciated as object for testing negative impact of pollution, so can be used as bio indicator of sea water and sediments quality. Identification of the presence of this animal is done at 11 locations inside the Bay of Boka Kotorska (Montenegro), during 2005/2006. Obtained results show that the sea-urchin inhabit only outer part of Boka Kotorska Bay, where is open sea impact very strong, while inner part of the Bay is characterized by absence of Paracentrotus lividus, what can be caused by potential low quality of the sea water in the Bay.

Factors controlling of arsenic content in underground water are commented on the base of experimental obtained results of analysis of water quality from October to November 2006. The influence of water quality parameters and temperatures of water on examined locations of waterworks of middle Banat, south from Zrenjanin, public wells in Zrenjanin and waterworks north from Zrenjanin, on arsenic content is found.