According to the Oregonian river bottom sediment reads more like a pharmacy nowadays. Scientists found Willamette and Tualatin rivers, Fanno Creek and the inlets of many smaller creeks such as Tryon, Johnson and Kellogg. These include venlafaxine, citalopram, diphenhydramine, diltiazem. fluoxetine (also known as Prozac) and cimetidine (or Tagamet), a heartburn drug.
It is all to do with the simple fact that water treatment plants were thought up before people started popping large amounts of modern chemicals. And washing them down with huge amounts of coffee. Because sediments are crawling with caffeine as well.
Apart from the risk to wildlife and the ecological services we enjoy from nature, water purification plants that make our drinking water have to find ways to removes them.
All of this adds up to the legacy of the industrial and consumption age making it more and more difficult for those who come after.