NEHA Wastewater Practice Test

Improperly treated wastewater discharge can lead to significant and harmful consequences in both human health and the environment. One of the most severe consequences is the spread of waterborne diseases. When wastewater is inadequately treated, pathogens present in the water can contaminate drinking water sources, leading to outbreaks of illnesses such as cholera, typhoid fever, and gastrointestinal infections. This poses a direct risk to public health, affecting communities and healthcare systems.

Additionally, improperly managed wastewater can disrupt local ecosystems. Nutrient overload from untreated sewage can result in algal blooms in water bodies, which deplete oxygen levels and create dead zones where aquatic life cannot survive. This disruption can lead to a decline in fish populations and other aquatic organisms, thereby impacting the entire food chain and biodiversity within that ecosystem.

Furthermore, pollution of drinking water sources is another critical consequence. Contaminated surface water can migrate to groundwater supplies, making it unsafe for consumption and requiring costly treatment solutions to restore water quality. This not only strains public health resources but can also lead to long-term environmental damage.

In contrast, the other choices highlight scenarios that are unlikely or even contradictory to the effects of improper wastewater treatment. For instance, increased tourism revenue and improved recreational areas typically stem from clean and well-maint