The work presents the level of the main pollutant emissions registered in the Oradea area, produced mainly by The Cogeneration Thermal Plant, running on pulverised low-grade coal and natural gas.The analysis emphasises the exceed of the allowed limits of the concentration of ash powder and SO2 emissions from the flue gases exhausted in the environment. The diminishing of the consumed fossil fuels by the improvement of the efficiency of energetic steam boilers, represents an important method of reducing the pollutant emissions.