Additionally, Agricultural pollution is a serious problem. Concentrated poultry production in Çorum and beef fattening and dairy production in Amasya, Tokat and Bafra together with over-use of inorganic fertilizers are polluting the surface and ground waters, causing disease problems, unbearable odor, and visual pollution. Wells in the residential areas are susceptible to seepages threatening the public health. Untreated waste water from agro-processing plants is discharged into the streams, ultimately  entering the Black Sea. Proper fertilizer use is another issue. Some efforts have been made to introduce soil analysis for better fertilizer application, but the impact is limited.