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EWG's Tap Water Database — 2019 UPDATE

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Glyphosate

Pennsylvania American Royersford

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND100ND
2015N/A00N/A
2016N/A00N/A
2017ND100ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 5 ppb

The EWG 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.

EPA Maximum Contaminant
Level (MCL) 700 ppb

The legal limit for glyphosate, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s. This limit does not account for the cancer risks of glyphosate and does not include any additional consideration of children’s health.

ppb = parts per billion

All test results

Date Lab ID Result
2014-04-0225339901ND
2014-04-0225340101ND
2014-04-0325339801ND
2014-04-0325340201ND
2014-06-2525340401ND
2014-08-0526516601ND
2014-08-0526516201ND
2014-08-0626516401ND
2014-08-0626516701ND
2014-08-1226516501ND
2017-04-1115931540ND
2017-04-1115931510ND
2017-04-1115931482ND
2017-04-1115931454ND
2017-04-1115931426ND
2017-08-1516560816ND
2017-08-1516560844ND
2017-08-1516560788ND
2017-08-1616560872ND
2017-08-3116721927ND