This study investigates the chemical concentration of borehole water in Yola-Jimeta Metropolis so as to
assess their suitability for domestic use. Water samples were collected from twenty-two boreholes, one
sample from each of the twenty-two administrative wards (Wards are the lowest political units in
Nigeria) in the metropolis. Samples were analyzed in the laboratory using standard guideline
procedures suggested by American Public Health Association (APHA). Eleven contamination indicators
were tested and results obtained were compared with chemical guideline values for drinking water
provided by World Health Organisation (2011) and Standard Organisation of Nigeria (2007). The study
reveals that chloride (Cl-
), iron (Fe++), nitrate (NO3
-
), pH, sodium (Na+
) and total hardness (CaCO3) are the
main sources of borehole water contamination in the study area. This has health implications that
include hypertensions and heart and kidney diseases which are on the increase in the region. Poor
sanitary condition and intensive use of inorganic fertilizer are implicated as sources of contaminants.
We therefore suggest the setting up of water sanitary agencies that will monitor and regulate health
based targets of water quality at ward levels.