Microbiological monitoring of river water quality is obligatory for use-related aspects such as drinking water production, irrigation and recreation. Assessment of the microbiological quality of water and sediment at the Velika Morava River was performed at five sites, during 2010 and 2011. By applying standard procedures for sanitary correctness and organic load assessment, total of 16 parameters were analyzed. Results of analysis indicated that microbiological water quality of the Velika Morava River is unsatisfactory.

In the spring/summer and autumn season of 2010 dynamics of macrozoobenthos structure of Moravica River was investigated after the changes in habitat caused by floods. It was found that macroinvertebrates are represented with 13 groups and 64 taxa from 54 genera. Trichoptera fauna was represented by 11 species, Diptera 10, 8 Ephemeroptera, Odonata 5, 6 Oligocheata, Gastropoda 5, Crustacea 3, 2 Hirudinea, Bivalvia 2 and Turbellaria 1. In average 11 taxa was identified in samples. Most abundant were Gammarus pulex fossarum, Grammarus balcanicus, Asellus aquaticus and Chironomus thumma. Abundance of macroinvertebrates at the downstream direction was increasing and was correlated with decreasing number of taxa especially in the spring season. Species are equal in number to the initial sites, and downstream a smaller number of species dominated. Average value of N-index was 2.1 which points to relatively favorable structure of macroinvertebrates. Average value of C of 0.32 indicates increased dominance of individual species. Saprobity index ranged from 1.6 to 3.5 at average of 2.3.

Physico-chemical and microbiological analysis of Brvenica River water was conducted in period 2006-2010 and showed seasonal variations of water quality. The results of correspondence analysis indicated that the year 2006 regarding the physical and chemical characteristics of water, was different from the rest of the examined period. This year was characterized by the absence of ammonia, low contents of nitrite, iron and chlorine, and increased concentrations of KMnO4 consumption. In 2007 and 2008 presence of manganese in water, low concentration of KMnO4 consumption was detected as well increased turbidity and electrical conductivity. And the third distinguish period are years 2009 and 2010 when water was characterized by low concentration of NO3, and the presence of ammonia, NO2, and iron in the water, while turbidity was low and conductivity was average. In Brvenica River water Escherichia coli, Citrobacter sp., Enterococcus sp., Klebsiella sp. are detected. In year 2006 number of aerobic bacteria and total coliforms were rather low, while their number in 2008 is relatively high. Over the whole period, only in 2008 fecal streptococci were not detected. Other years are characterized by growth of aerobic bacteria and total coliforms and the occasional presence of fecal streptococci. Throughout the whole examination period fecal coliform bacteria were present in the water.

This paper presents the results of the Danube River water quality analysis based on the calculated SWQI index values, using the data set provided by the Hydrometeorological service of the Republic of Serbia for the year 2009. The relevant parameters are sampled once a month on average, at 16, measuring stations of the River Danube along the flow through Serbia. Data grouped on the sampling site basis, averaged on a yearly level, resulting in a median SWQI for each sampling station, are employed to obtain a synthesized quality indicator. Research shows that the overall quality of the water of the Danube in Serbia, SWQI = 85 for the given one-year period and to match the descriptive indicator very good water quality.

The paper presents results of microbiological quality of three drinking water sources – Ratno ostrvo, Petrovaradinska ada and Strand. The following analyses were carried out in 2010: total count of aerobic mesophilic bacteria at 37 deg C, count of organotrophs (categorization according to Kohl), aerobic facultative organotrophs, lipolytic and hydrocarbon oxidizing bacteria. Organotrophic count was determined on low nutritive R2A medium. Enzymatic activity of water was also determined and water was categorized according to index of phosphatase activity (IFA).

A contemporary biostability assessment of raw and treated water requires determination of biodegradable organic matter fraction responsible for bacterial growth. BDOC test allows monitoring of bacterial growth by assaying chemical changes in the test-water and thereby determine the content of biodegradable dissolved organic carbon (BDOC). The aim of this study was to optimize the required period for performance of BDOC tests, and to examine the use effectiveness of different biofilm carrier. The results indicate that the BDOC test with sand-inoculation is more effective compared to the anthracite, and recommendations for monitoring of biodegradation process are a period of 3-5 days.

Land reclamation activity, such as irrigation, requires monitoring in order to create conditions for a stable and highly productive crop production. It is necessary to monitor the use of water for irrigation in order to prevent or mitigate the consequences of unfavorable, poor quality water on soil irrigation, cultivated crops or equipment. In the province of Vojvodina, the Detailed Channel Network has a great potential. The specificities of this source of water for irrigation need to be observed in the usability of water. In 2010 the sampling was conducted in selected localities in middle Backa and Banat. The results indicate that water quality does not always meet the requirements proposed by the applied classification. What is particularly unfavorable is the fact that the worst quality was registered during the survey conducted at the beginning of the irrigation season on all sites.

The aim of this work was to determine the bacteriological status of water catchment, basin, which is used for water supply of the town of Krusevac, as well as the distribution of present bacteria morphotypes. The total count of bacteria ranged from 1.35x10**5/ml to 2.09x10**7/ml. The number of aerobic heterotrophs ranged from 415 CFU/ml to 64,500 CFU/ml. The differentiation of bacteria in three morphotypes (rods, cocci and curved) was made. Representation of rods ranged from 40.05% to 78.71%, cocci from 4.39% to 60.88% and curved from 1.54% to 17.20%. Seasonal and vertical distribution of morphotypes showed increased presence of rods and curved forms in terms of increased bacteriological load of water, while the presence of cocci increased in conditions of cleaner water.

The concentration of trace metals (Pb, Cd, As and Hg) were measured in sea water and sediments in the coastline of the Montenegro. The obtained results of trace metals in sea water were compared with those found in the sediment. Sampling was performed in the fall of 2005 and spring 2006 at five locations in the Montenegrin coastline, Sveti Stasije, Herceg Novi, Budva, Bar and Rt Djeran which present different levels and sources of human impact. The heavy metals analyses in seawater and sediment of the Montenegrin coastline identified to be contaminated with lead the harbor Bar and Sv. Stasije, with arsenic Rt Djeran, with mercury the harbor Bar and Herceg Novi and with cadmium Herceg Novi.

In this work physico-chemical and microbiological indicators of coastal waters of Boka Kotorska Bay were presented. As results these parameters of waters quality for mariculture were estimated, especially for breeding of high quality species: mussels-Mytilus galloprovincialis and oyster-Ostrea edulis. The data of primary production which is important for food chain for these organisms were presented. Investigated locations are suitable for mariculture which was requested from Public Enterprise Coastal zone. Temporary, higher eutrophic level was noticed as result of anthropogenic influence. The data are from one year period (2010- montly and seasonally intervals) by monitoring on 10 locations.