From 2002. Just because it's older, does not mean it loses importance. It shows a long period of concern by many, but not all, US gov't agencies.
The 2002 study is the first to look for the broad-spectrum herbicide
glyphosate, its primary degradation product aminomethylphosphonic acid
(AMPA), as well as antibiotics during runoff events in Midwestern
154 water samples were taken from 9 midwestern US states.
USGS Toxics program. 2002.