Nitrates and nitrites content of water boreholes and packaged water in Calabar metropolis

  • CAO Usoro Department of Chemical Pathology, University of Calabar Teaching Hospital, Calabar, Nigeria
  • L Ibiang Department of Chemical Pathology, University of Calabar Teaching Hospital, Calabar, Nigeria
  • IN Usoro Department of Surgery, University of Calabar Teaching Hospital, Calabar, Nigeria
  • AC Nsonwu Department of Chemical Pathology, University of Calabar Teaching Hospital, Calabar, Nigeria
  • MH Etukudo Department of Chemical Pathology, University of Calabar Teaching Hospital, Calabar, Nigeria
Keywords: Nitrates, Nitrites, Boreholes, Packaged Water

Abstract

Nitrate and nitrite levels were determined in forty-three water samples obtained from different locations in Calabar using colorimetric methods. Twenty-three of these samples were packaged water while twenty were borehole water. Nitrate levels were found to be 24.28 ± 9.30μg/ml and 34.57 ± 14.56µ/ml for packaged water and borehole water respectively. Nitrite concentration were 0.09 ± 0.07μg/ml and 0.06 ± 0.06µg/ml for packaged water and borehole water respectively. Nitrates were significantly (P < 0.05) higher in borehole water than in packaged water. The mean nitrate and nitrite levels in water samples studied were below the allowed Maximum Contamination Level (MCL) of 44.30μg NO3/ml and 1.00μg NO3/ml respectively as recommended by United States Public Health Service and adopted by Federal Environmental Protection Agency of Nigeria (FEPA). The toxicological importances of the findings are discussed.
Keywords: nitrates, nitrites, boreholes, packaged water

Mary Slessor Journal of Medicine Vol. 5(1), 2005: 7-10
Published
2005-08-31
Section
Articles

Journal Identifiers


eISSN: 1119-409X
print ISSN: 1119-409X