Glyphosate

Marina Coast Water District

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2014	N/A	0	N/A
2015	N/A	0	N/A
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	ND	14	ND

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
2019-09-25	9590-008-0725	ND
2019-09-25	9590-009-0815	ND
2019-09-25	9590-026-1220	ND
2019-09-25	9590-027-0918	ND
2019-09-25	9590-028-0945	ND
2019-09-25	9590-033-1025	ND
2019-09-25	9590-034-1134	ND
2019-12-17	9590-008-1311	ND
2019-12-17	9590-009-1351	ND
2019-12-17	9590-026-1231	ND
2019-12-17	9590-027-1000	ND
2019-12-17	9590-028-1110	ND
2019-12-17	9590-033-1153	ND
2019-12-17	9590-034-0913	ND