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EWG's Tap Water Database

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Glyphosate

Status: National drinking water standard exists

 

Glyphosate is the weedkiller marketed as Roundup. The state of California classifies glyphosate as a chemical known to cause cancer. Read More.

Glyphosate is classified as a probable human carcinogen by the International Agency for Research on Cancer and has been linked to increased risk of non-Hodgkin's lymphoma in people. Exposure to glyphosate during pregnancy may affect fetal development.

2015:

FOUND
FOUND ABOVE HEALTH GUIDELINES

2

states detected

3

utilities detected

8,661

people served

2

states over health guideline

3

utilities over health guideline

8,661

people served over health guideline

Health concerns for glyphosate

Cancer

Harm to fetal growth

Harm to the kidney

State and national drinking water standards and health guidelines

Health Guideline 5 ppb

The health guideline of 5 ppb for glyphosate was defined by EWG as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 700 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)700 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

States reporting glyphosate in drinking water

UTILITIES REPORTING ABOVE HEALTH GUIDELINES UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served UtilitiesPeople Served
Louisiana26,09326,093
Florida12,56812,568
MORE
LESS

Utilities with the highest amounts of glyphosate, 2015

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
Polk City SystemPolk City, FL1 of 39.00 ppb2,568
Turkey Creek Water System*Gilbert, LA2 of 88.35 ppb1,248
Egan Water CorporationEgan, LA2 of 45.05 ppb4,845

* 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 Glyphosate, but it likely has the contaminant in its water supply.

UtilityLocationTestsAverage levelPeople served