Evaluation of the Ecochemical Status of the Danube in Serbia in Terms of Water Quality Parameters

Table 4

Parameters of the Danube River at selected measuring stations along the course through Serbia.

	Temperature (°C)	pH	Conductivity (μS/cm)	Oxygen saturation (%)	BOD-5 (mg/L)	Suspended matter (mg/L)	Total nitrogen oxides (mg/L)	Orthophosphate (mg/L)	Ammonium (mg/L)	E. coli (n/1l)
The Danube River, the entry profile—measuring station Bezdan
Min.	3.2	8.0	334	79	1.0	6	1.091	<0.010	0.03	500
Max.	22.4	8.7	518	130	4.5	54	3.433	0.067	0.17	24000
Medium	13.2	8.3	411.8	97.7	2.2	32.4	1.891	0.044	0.08	11 498
The Danube River—measuring station Pančevo
Min.	3.3	7.9	340	82	1.1	8	0.721	0.013	0.02	2100
Max.	24.2	8.6	465	128	4.2	78	1.922	0.070	0.16	24000
Medium	14.6	8.2	398.3	95.7	2.3	31.6	1.332	0.047	0.09	18 525
The Danube River, the exit profile—measuring station Radujevac
min	3.9	7.1	248	74	1.5	2	0.228	0.053	0.02	<200
max	25.3	8.1	428	132	3.2	30	1.618	0.550	0.57	<2000
medium	15.5	7.7	372.6	93.2	1.9	9.8	0.983	0.200	0.12	636
Council Directive 75/440/EEC concerning the quality required of surface water
A1	22	6.5–8.5	1000	>70	<3	25	1	0.4	0.05	20
A2	22	5.5–9	1000	>50	<5	—	2	0.7	1	2 000
A3	22	5.5–9	1000	>30	<7	—	3	0.7	2	20 000