 The biggest source of pollution is Lukoil Permneft Ltd, whose waste reaches Mulyanka by the Pyzh River.The oil products content of Mulyanka water at the place of the Pyzh's confluence exceeds the Maximum Permissible Concentration 49.4 times.Close to the mouth of Mulyanka ammonium content exceeds the MPC 1.3 times, 2.5 times for nitrites and 2 times for the oil products.