Global Journal of Science Frontier Research, H: Environment & Earth Science, Volume 21 Issue 6

Table 1: Measured values with measurement uncertainty in samples from the South Morava River and limit values Sampling Location By The Marmole Mezgraja- Code Railway Bridge Limit Values, By Class Sample Identification Number Unit 2202/17 - 249 2202/17- 248 I Ii Iii Iv V PARAMETER Rez ±MN Rez ±MN Water temperature o C 6,6 ±0,3 7,1 ±0,4 / / / / / A noticeable color bez bez / / / / / GENERAL PARAMETERS pH 7,39 ±0,44 7,86 ±0,47 6.5-8.5 6.5-8.5 6.5-8.5 6.5-8.5 <6.5 ili>8.5 Suspended mat. mg/L 22 ±5 24 ±5 25 25 - - - Dissolved oxygen mgO 2 /L 8,01 ±1,84 8,06 ±1,85 8,5 7 5 4 <4 Oxygen saturation % 83 ±0,83 82 ±0,82 70-90 50-70 30-50 10-30 <10 BPK5 mgO 2 /L 66 ±17 24 ±6 1,8 4,5 7 25 >25 HPK mgO 2 /L 103 ±26 37 ±9 10 15 30 125 >125 Total organic carbon (TOC) mg/L 5,9 ±1,3 3,9 ±0,9 2 5 15 50 >50 NUTRIJENTI Total nitrogen mgN/L 1,60 ±0,40 1,77 ±0,44 1 2 8 15 >15 Nitrates mgN/L <0,4 ±/ <0,4 ±/ 1,5 3,0 6 15 >15 Nitrites mgN/L 0,07 ±0,01 0,07 ±0,01 0,01 0,03 0,12 0,3 >0.3 Ammonium ion mgN/L 0,195 ±0,030 0,320 ±0,050 0,05 0,1 0,6 1,5 >1.5 Total phosphorus mgP/L 0,072 ±0,012 0,047 ±0,008 0,05 0,20 0,4 1 >1 Orthophosphates mgP/L 0,221 ±0,035 0,144 ±0,023 0,02 0,1 0,2 0,5 >0,5 SALINITY Chlorides mg/L 15,6 ±4,1 14,9 ±3,9 50 150 200 250 >250 Total chlorine residual mg/L HOCl <0,005 ±/ <0,005 ±/ 0,005 0,005 - - - Sulphates mg/L 6 ±1 8 ±1 50 100 200 300 >300 Total mineralization mg/L 150 ±17 245 ±67 <1000 1000 1300 1500 >1500 Electroconductivity at 20°C μ S/cm 274 ±37 270 ±36 <1·10 6 1·10 6 1,5·10 6 3·10 6 >3·10 6 Total hardness (as CaCO 3 ) mg/L 166 ±33 198 ±40 / / / / / ORGANIC SUBSTANCE Phenolic compounds μ g/L <2 ±/ <2 ±/ <1 1 20 50 >50 Total hydrocarbons μ g/L 280 ±110 700 ±300 / / / / / PAM μ g/L <30 ±/ <30 ±/ 100 200 300 500 >500 METALS Arsenic μ g/L < 0,05 ±/ < 0,05 ±/ <5 10 50 100 >100 Bor μ g/L < 50 ±/ < 50 ±/ 300 1000 1000 2500 >2500 Copper μ g/L 37 ±11 45 ±14 40 40 500 1000 >1000 Zinc μ g/L 149 ±49 137 ±45 300 1000 2000 5000 >5000 Chrome μ g/L < 8 ±/ < 8 ±/ 25 50 100 250 >250 Iron μ g/L 670 ±170 610 ±160 200 500 1000 2000 >2000 Manganese μ g/L 28 ±7 < 3 ±/ 50 100 300 1000 >1000 Lead μ g/L < 6 ±/ < 6 ±/ / / / / / Cadmium μ g/ < 5 ±/ < 5 ±/ / / / / / Nickel μ g/ < 3 ±/ < 3 ±/ / / / / / MICROBIOLOGICAL PARAMETERS Total coliform MPN/100 400 200 500 10 000 100 1 000 >1000 000 Water Quality Control of the Southern River Water in the Territory Town of Vranja © 2021 Global Journals 1 Global Journal of Science Frontier Research Volume XXI Issue VI Year 2021 84 ( H ) Version I