Purest background reservoirs are mountain ones, with low miniralization of water.
The water objects of a foothill zone, places of rest are faintly polluted where the concentration of organic and non-organic substances are higher in comparison with background concentration
The valley water objects are polluted not very high. Content of mineral and organic substances, petroleum, heavy metals in the water is 2-3 times higher than it is established in the specifications.
Lakes, rivers are related to moderate-polluted and polluted zones It is constantly marked the exceeding of the established specifications. Miniralization grows in comparison with a background in 4-5 times.
The drainage network in a zone of farmlands is highly polluted, where miniralization of water exceeds the established spefications in 3-5 times.
Dirty both very dirty reservoirs are in densely populated industrial cities and outside of urban agglomerations.The organic substances, complex multicomponent drains containing toxic combinations are dumped in to the reservoirs. The concentration of heavy metals here sometimes exceeds the established spefications in 40-50 times and constantly keeps at a level exceeding the spefications .
Last years reduction of application of mineral fertilizers and pesticides in the agriculture, drastic reduction of contaminated waste in open water had a positive effect on the pollution situation..
