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EWG's Tap Water Database — 2021 UPDATE

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Glyphosate

Lafayette Utilities Water System

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

 

84

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
2014ND20ND
2015ND300ND
2016ND140ND
2017ND40ND
2018ND200ND
2019ND140ND

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
2014-11-03AD99281ND
2014-11-03AD99281ND
2015-02-2335176705001ND
2015-02-2335176705001ND
2015-06-0835192506001ND
2015-06-0835192506001ND
2015-07-2735199527004ND
2015-07-2735199527001ND
2015-07-2735199527002ND
2015-07-2735199527003ND
2015-07-2735199527004ND
2015-07-2735199527005ND
2015-07-2735199527003ND
2015-07-2735199527002ND
2015-07-2735199527001ND
2015-07-2735199527005ND
2015-08-1735203222004ND
2015-08-1735203222003ND
2015-08-1735203222002ND
2015-08-1735203222001ND
2015-08-1735203222005ND
2015-08-1735203222005ND
2015-08-1735203222004ND
2015-08-1735203222003ND
2015-08-1735203222002ND
2015-08-1735203222001ND
2015-11-3035218949004ND
2015-11-3035218949003ND
2015-11-3035218949004ND
2015-11-3035218949005ND
2015-11-3035218949003ND
2015-11-3035218949005ND
2016-03-1435234164005ND
2016-03-1435234164005ND
2016-03-2135235879005ND
2016-03-2135235879005ND
2016-08-0835259258005ND
2016-08-0835259258005ND
2016-08-1535260131004ND
2016-08-1535260131001ND
2016-08-1535260131002ND
2016-08-1535260131003ND
2016-08-1535260131001ND
2016-08-1535260131002ND
2016-08-1535260131004ND
2016-08-1535260131003ND
2017-09-2535338379001ND
2017-09-2535338379001ND
2017-11-2735350946001ND
2017-11-2735350946001ND
2018-03-0535378308004ND
2018-03-0535378308005ND
2018-03-0535378308005ND
2018-03-0535378308004ND
2018-03-0535378308003ND
2018-03-0535378308001ND
2018-03-0535378308003ND
2018-03-0535378308002ND
2018-03-0535378308001ND
2018-03-0535378308002ND
2018-04-3035389627001ND
2018-04-3035389627001ND
2018-05-1435392629001ND
2018-05-1435392629001ND
2018-06-1935399735003ND
2018-06-1935399735002ND
2018-06-1935399735001ND
2018-06-1935399735001ND
2018-06-1935399735002ND
2018-06-1935399735003ND
2019-01-1435442609002ND
2019-01-1435442609001ND
2019-01-1435442609001ND
2019-01-1435442609002ND
2019-08-1235490056001ND
2019-08-1235490056005ND
2019-08-1235490056004ND
2019-08-1235490056003ND
2019-08-1235490056002ND
2019-08-1235490056001ND
2019-08-1235490056005ND
2019-08-1235490056004ND
2019-08-1235490056003ND
2019-08-1235490056002ND