| Popis: |
Over the course of four months, the levels of nitrates and nitrites in drinking water from two local government areas in Ilorin, Kwara State, were assessed using a HACH DR/EL 5 Spectrophotometer. The average nitrate (NO3-N) concentration in the borehole is 0.185 mg/L, while nitrites (NO2-N) concentration is 0.044 mg/L. The mean concentration of nitrate (NO3-N) in the well is 0.915 mg/L, whereas nitrites are 0.087 mg/L. The measured means for both nitrates and nitrites in groundwater, as well as the highest single-point values, are substantially below the WHO MCL (maximum contamination level) of 10.0 mg/L nitrate as NO3-N and 3.0 mg/L nitrite as NO2-N. The results are likewise below the NSDWQ's (Nigerian Standard for Drinking Water Quality) maximum permissible levelsof 50 mg/L nitrate as NO3-N and 0.2 mg/L nitrite as NO2-N. |
