Some aspects of monitoring the area of Middle Ob river

The investigated area of Middle Ob river within 42-kilometer water area above and below Surgut is characterized by alkalescent and alkaline values of water рН. Waters of the given water area have the low maintenance of sulfates and concentration of phosphates are in maximum concentration limit. From elements of nitric group maximum concentration limit excess under the maintenance of ammonium nitrogen is revealed. Number of saprophytic heterotrophic and litoautotrophic microflorae are considerable (0,3-0,35 thousand in kl/ml). Number of allochthonous microflorae during the summer period reaches the values of 04,-0,6 thousand in kl/ml).