How do pharmaceutical drugs get in drinking water (H2O)? At what level are these drugs considered dangerous when identified? These questions are presented frequently in scientific communities. However, not every one is a scientist. It is normal for everyday people to express concern.
Medications prescribed by physicians, as well as over the counter medicines, register way below prescribed dosages when discovered in H2O samples. However, this does not address the fact of why it is there in the first place. Tracking the steps, from consumption to disposal, will help answer this question. People take medications to treat chronic illnesses or temporary aches and pains. The human body digests the pill or liquid and absorbs a certain percentage of the medication. Remaining amounts not absorbed by the body are eliminated through bowel movements and urination.
Sewage, or waste H2O, is treated prior to being released into reservoirs and rivers. When drinking plants need to replenish their supplies, more is brought in and further treatments are performed. Drinking plants are the last facilities that screen and treat water before releasing mass amounts to private homes. The combination of these treatments do not remove all traces of medications.