Water Pollution and Treatment Exam Questions with Verified Answers

water quality - Answer-determined by effects on public health, how much it is away from the normal concentrations, the expected end use of the impact on the ecosystem water pollution - Answer-degradation of water quality what is the largest concern of polluted water globally? - Answer-a lack of clean and disease free drinking water what do water pollutants include? - Answer-heavy metals, sediment, certain radioactive isotopes, heat, fecal coliform bacteria, phosphorus, nitrogen, sodium, and other useful elements, as well as certain pathogenic bacteria and viruses what does most water pollution result from? - Answer-runoff and leak or seepage of pollutants into surface water or groundwater. pollutants are also transported by air and deposited in bodies of water. point sources - Answer-are distinct and confined such as pipes from industrial and municipal sites that empty into streams or rivers nonpoint sources - Answer-are those that come from a large area such as parking lot or agricultural land runoff runoff - Answer-is water that runs over the surface of land and collects all of the pollutants that were deposited on that surface pollutants in runoff include: - Answer- is it difficult to monitor disease-carrying organisms? - Answer-yes what do we use the count of as a standard measure and indicator of disease potential? - Answer-fecal coliform bacteria the growth of the fecal coliform bacteria will cause a decrease in what? - Answer-the biological oxygen demand what does the presence of fecal coliform bacteria in water indicate? - Answer-that fecal material from mammals or birds is present, so organisms that cause water borne diseases may be present what are two important nutrients that cause water-pollution problems? - Answer-phosphorus and nitrogen(both are released from sources related to land use)