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EWG's Tap Water Database — 2019 UPDATE

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Glyphosate

City of Caldwell

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.

 

16

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
2013ND40ND
2014ND40ND
2015ND30ND
2016ND50ND
2017N/A00N/A

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
2013-09-25S1341763ND
2013-09-25S1341762ND
2013-09-25S1341755ND
2013-09-25S1341752ND
2014-02-26S1407039ND
2014-06-18S1422594ND
2014-09-29S1438512ND
2014-11-13S1445335ND
2015-03-10S1509143ND
2015-05-06S1517379ND
2015-09-24S1541055ND
2016-09-06S1640378ND
2016-09-06S1640377ND
2016-09-06S1640376ND
2016-09-06S1640375ND
2016-09-06S1640374ND