Sewage refers to the liquid waste collected from domestic, commercial, and industrial establishments, combined with ground water, surface water, and storm water. In public health nursing, proper management of this waste is foundational to preventing disease transmission. When wastewater accumulates without adequate drainage or treatment, it creates breeding grounds for vectors like mosquitoes and pollutes surrounding water sources used for drinking and bathing.
Waterborne illnesses remain a major challenge in resource-limited settings across Nigeria. Pathogens from human waste easily contaminate local streams and boreholes if infrastructure fails. Community health nurses witness firsthand how poor environmental sanitation triggers outbreaks of preventable infections, making sewage control a primary line of defense in healthcare.
Wastewater is largely water, typically containing less than 0.1% dissolved and suspended solid impurities. These impurities include human excreta, food scraps, soaps, oils, and chemical residues.
Aerobic and anaerobic bacteria break down the organic load in sewage. As they consume waste, they consume dissolved oxygen in the water, which can suffocate aquatic life if untreated effluent enters natural water bodies.
Improperly managed wastewater is a vehicle for a wide variety of infectious agents. Transmission typically occurs through the fecal-oral route, either by drinking contaminated water or eating food washed with it.
Where municipal sewer lines are absent, individual properties rely on on-site sanitation facilities to contain and partially treat waste.
Proper siting is essential for all on-site systems to prevent raw effluent from leaching into shallow groundwater wells used for drinking.
Urban areas utilize centralized networks of underground pipes, pumping stations, and treatment plants to manage large volumes of community wastewater. This infrastructure moves waste away from populated zones toward treatment facilities before safe discharge or reuse.
When sewage management systems fail, the consequences ripple across both the ecosystem and human populations. Uncontrolled discharge into rivers and lagoons causes severe environmental degradation. The surplus nutrients from organic waste trigger massive algal blooms, which consume oxygen and result in fish kills.
From a nursing perspective, communities experiencing sewage overflows face high burdens of cholera, typhoid, and skin infections. Children playing in stagnant, contaminated floodwaters are especially vulnerable. Beyond infectious diseases, decaying waste emits foul gases like hydrogen sulfide, causing chronic respiratory irritation and lowering the overall quality of life in affected neighborhoods.
Nurses play a vital role beyond hospital walls by acting as educators and advocates for environmental health. In primary healthcare clinics and community outposts, nurses identify sanitation gaps and lead public health campaigns.