City of Flint
Estriol is one of the 3 types of estrogen made by the human body. Sex hormones get into water downstream from livestock and pharmaceutical production, or incomplete removal in waste water treatment. There are no standards to gauge how risky additional hormones are for human health.
Testing results - average by year
|Year||Average result||Samples taken||Detections||Range of results|
ppt = parts per trillion.
All test results