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EWG's Tap Water Database — 2021 UPDATE

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Glyphosate

South Island PSD

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.

MORE ABOUT THIS CONTAMINANT

 

23

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND120ND
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019ND110ND

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
2014-02-04AD35237ND
2014-02-04AD35252ND
2014-02-04AD35253ND
2014-02-04AD35231ND
2014-02-10AD35468ND
2014-02-10AD35474ND
2014-02-10AD35475ND
2014-02-10AD35476ND
2014-04-14AD38376ND
2014-04-14AD38374ND
2014-04-14AD38363ND
2014-04-14AD38360ND
2019-09-11AE36990ND
2019-09-11AE37008ND
2019-09-11AE37010ND
2019-09-12AE37131ND
2019-09-17AE37328ND
2019-09-17AE37326ND
2019-09-18AE37423ND
2019-09-18AE37429ND
2019-09-18AE37442ND
2019-11-13AE40103ND
2019-11-13AE40114ND