In a home with older toilets, an average flush uses about 3.6 gallons (13.6 liters), and the daily use is 18.8 gallons (71.2 liters) per person per day. In a home with ultra-low-flow (ULF) toilets, with an average flush volume of 1.6 gallons (6 liters), the daily use is 9.1 gallons (34.4 liters) per person per day.
Quick Answer. Elevated monocyte levels, or monocytosis, may be due to chronic inflammatory disease, stress response, leukemia, parasitic or viral infection or tuberculosis, as MedlinePlus indicates. A complete blood count gives insight into the number of each kind of blood cell present in the body, according to WebMD.
Occasionally, benign kidney cysts and kidney obstruction (hydronephrosis) can also secrete extra erythropoietin causing polycythemia. A rare genetic condition, called Chuvash polycythemia, causes increased activity of the gene that produces erythropoietin. The overproduction of erythropoietin causes polycythemia.