Nitrate And Phosphate Levels In River Jakara, Kano State, Nigeria.

Abstract

Nitrate and phosphate levels of the surface water of River Jakara in Kano State, Nigeria, were determined over a period of twelve months (January to December 2003) at 5 sampling sites along the river. The nitrate and phosphate values showed significant difference (p < 0.05) between seasons. The lowest mean concentration (3.25mg/l) of nitrate was observed in March (dry season) and the higher mean values of 11.46mg/l and 10.10mg/l were observed in August and September respectively, both significantly different (p < 0.05) from the other months. The lowest mean concentration of phosphate (3.80mg/l) was recorded in April and was significantly different (p < 0.05) from the other months; higher values were obtained in July and August. Higher mean values of both nutrients in most of the sites during the wet seasons were related to surface run offs containing domestic wastes, and fertilizers applied to farmlands. The nitrate value did not exceed the international maximum permissible limit but the phosphate did. It was proffered that sewers and waste treatment facility is of paramount importance in Kano, while the relevant organ of government should find alternative farmlands for the farmers.