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EWG's Tap Water Database

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Estriol

Status: No national drinking water standard exists

 

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.

2010-2015:

FOUND

2

states detected

7

utilities detected

18,199

people served

States reporting estriol in drinking water

UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served
California111,094
Illinois67,105
MORE
LESS

Utilities with the highest amounts of estriol, 2010-2015

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Sierra Madre Water DepartmentSierra Madre, CA1 of 40.275 ppt11,094
Gillespie*Gillespie, IL1 of 40.230 ppt3,646

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Estriol, but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served
Sierra Madre Water DepartmentSierra Madre, CA1 of 40.275 ppt11,094