The size of the drain field is determined by how well the ground absorbs water. In places where the ground is hard clay that absorbs water very slowly, the drain field has to be much bigger. A septic system is normally powered by nothing but gravity.he size of the drain field is determined by how well the ground absorbs water. In places where the ground is hard clay that absorbs water very slowly, the drain field has to be much bigger. A septic system is normally powered by nothing but gravity.
Filed Under: Tech & Science, mental health. Every year, about 42.5 million American adults (or 18.2 percent of the total adult population in the United States) suffers from some mental illness, enduring conditions such as depression, bipolar disorder or schizophrenia, statistics released Friday reveal.
Second in our 6-part series on mental health. Millions of Americans experience anxiety, depression, bipolar disorder or other mental and behavior health ills; for them, mental health care is not optional. Yet for the millions of Americans who have to pay out of pocket for mental health treatment, cost is a barrier to getting the service they need. The math: The NIH states that 26% of the adult population of 240 million experience mental health problems.