Many wastewater treatment plants are inefficient as the treated water they discharge into water bodies significantly exceeds MACs for ammonium, nitrites, organic substances, copper, chrome and oil products. Although the soil pollution at old pesticide landfills and former agricultural airfields has been decreasing, it still substantially exceeds the MACs in terms of chlororganic pesticides. The areas of agricultural lands polluted by nitrates and phosphates have been increasing in Uzbekistan.