Abstract
This study investigated the impact assessment of poultry wastes discharge from a nearby poultry farm on the physico-chemical and microbiological water quality of Olosuru Stream, Ikire, Southwestern Nigeria. Five sampling stations (designated A, B, C, D and E) each located at 250 m interval along the course of the stream were selected for the study. The physico-chemical parameters in the water body vary in concentration along spatial, monthly and seasonal variation of Olosuru stream. The patterns of spatial distribution of physico-chemical parameters measured for the stream were generally similar except for calcium and hardness which showed significant difference for the five stations. The overall mean values of most of the parameters investigated; pH (7.45 ± 0.24), conductivity (628.69 ± 255.95 μs/cm), TDS (377.3 ± 153.55 mg/L), sulphate (10.89 ± 2.37 mg/L), BOD5 (3.19 ± 2.35 mg/L), cadmium, arsenic, manganese, total heterotrophic bacteria count (15,080.67 ± 20,250.67 cfu/ml), total coliform bacteria count (3226 ± 8426.70 cfu/ml) and total heterotrophic fungi count (2567.4 ± 7652.12 cfu/ml) were negatively impacted by poultry wastes dumping into the stream. The concentrations of most parameters exceeded recommended permissible limits of the Nigerian Standard for Drinking Water and World Health Organization for freshwater quality. The water source is therefore deemed not potable and poses hazards to public health if consumed without treatment. There is urgent need for improved management strategies of this water resource for continued sustainability.
Highlights
Water covers about 70% of Earth’s surface, makes up about 70% of human body mass, and is essential for life [1]
This study investigated the impact assessment of poultry wastes discharge from a nearby poultry farm on the physico-chemical and microbiological water quality of Olosuru Stream, Ikire, Southwestern Nigeria
The patterns of spatial distribution of physico-chemical parameters measured for the stream were generally similar except for calcium and hardness which showed significant difference for the five stations
Summary
Water covers about 70% of Earth’s surface, makes up about 70% of human body mass, and is essential for life [1]. The water quality of a body of water influences its use by the riparian communities for drinking, swimming or commercial purposes. Water and water bodies may be used by the community for the following purposes: drinking and domestic purposes, recreation (swimming, boating, surfing, skating, etc.), irrigation of crops and watering of livestock, industrial processes, navigation and shipping, production of fin fish and shell fish, protection of aquatic ecosystems, wildlife habitats and scientific study and education [5]. Pollution of the aquatic environment, as defined by [6], occurs when humans introduce, either by direct discharge to water or indirectly (for example through atmospheric pollution or water management practices), substances or energy that result in deleterious effects such as: hazards to human health, harm to living resources, hindrance to aquatic activities such as fishing and impairment of water quality with respect to its use in economic activities, or reduction of amenity value
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