Saheed OS Enabulele OI and Obayagbona NO.

• access_time5 July, 2025

  subjectCategory: Environmental Sciences

• The physico-chemical and bacteriological qualities of water samples sourced from five communities in Orhionmwon LGA were determined using standard methods. Bacteriological enumeration was carried out the membrane filter technique and isolates identified using routine cultural and biochemical procedures. A total of 50 samples comprising of 25 wells and 25 ground water (borehole) samples were examined. The physicochemical parameters ranges include; pH{well water samples (5.64±0.19-6.56±0.06), ground water (borehole) samples (4.46±0.05-5.76±0.08)}, Electrical conductivity {well water samples (46.00±6.00 µS/cm66.67±31.80µS/cm),ground water (borehole) samples (8.00±1.22µS/cm - 22.00±12.00µS/cm)}. The mean heterotrophic bacterial counts of the well water samples were highest in Ogan with counts of 8.24±1.09 × 2 10 cfu/100ml.The mean coliform counts for both the well and ground water (borehole) samples were highest in 2 2 Igbanke community with counts of 2.34 ± 0.25 × 10 cfu/100ml and 2.02±0.52 ×10 cfu/100ml respectively. Eight bacterial genera were isolated from the water samples namely, Klebsiella, Pseudomonas, Proteus, Acinetobacter, Alcaligenes, Enterobacter, Citrobacter and Escherichia. Citrobacter freundii had the highest number of haemolytic isolates (83.33%). Pefloxaxin was the most active antibiotic against all the bacterial isolates as it was active against 97.62% of the isolates. For the respective water samples, the heterotrophic and coliform counts fall short of the WHO standards.
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