Buzău River Basin has an elongated shape and asymmetrical upper and middle oriented NW-SE and VE, even with a slight SW-NE direction return to the area of subsidence from the mouth in its collector, Siret River. Asymmetry is more pronounced in the middle and lower tributaries where most come from the left.

According to the National Surveillance System, knowledge about the flowing surface water quality network includes a control section, located on the surface watercourses in the most representative for assessing water quality. (Negulescu M. 1982)

So the unit element of the system is the control section, which is where the place where the regular collection of water samples.

Establishment of the network monitoring was done taking into account: the degree of representation on zoning highlighting the significant quality of that water, can correct flow measurement as related to qualitative determinations: the stability of the riverbed and appropriate access and working conditions.

This Buzău river water quality is addressed in 6 Sections of Control: Vama Buzău Nehoiu Magura, Buzău Upstream city, and Racoviţa bushel.

Nehoiu monitoring section is located downstream of settlements Nehoiu at an altitude of 343m, about 66 km from Vama Buzau control section. The average slope of the watercourse is 12 ‰ and a coefficient of sinuosity of 3.07.

Măgura is the third section of Buzau River monitoring, situated in the locality of Magura. It is situated at an altitude of 230m, and 46 km from Nehoiu section. The average slope is 10 ‰ with a 2.44 coefficient of sinuosity, bed width of 12m and depth of 0.70m. Litho logical structure is dominated by gravel and sand patches.

Upstream Section Buzău city was chosen to evaluate the effect of wastewater discharges from the city of Buzău. That is why it was placed upstream to compare with results from downstream section of the city of Buzau. It is situated at an altitude of 95m, an average slope of 7 ‰, litho logical structure of the bed the bed is dominated by sand and gravel. Bed width is 18 m and average depth of 0.90 m. It is located 30 km upstream monitoring section.