Glyphosate

Redlands City

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
2013	N/A	0	N/A
2014	N/A	0	N/A
2015	ND	1	ND
2016	ND	1	ND
2017	N/A	0	N/A
2018	N/A	0	N/A
2019	ND	19	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
2015-05-21	9590-026-1120	ND
2016-05-12	9590-026-0915	ND
2019-06-20	4790-035-0930	ND
2019-06-27	4790-070-1325	ND
2019-06-27	4790-003-0845	ND
2019-06-27	4790-069-0945	ND
2019-08-19	4790-062-0950	ND
2019-08-19	4790-008-1100	ND
2019-08-21	4790-021-1140	ND
2019-08-22	4790-019-1050	ND
2019-08-27	4790-053-1350	ND
2019-08-27	4790-055-0800	ND
2019-08-27	4790-060-1230	ND
2019-08-28	4790-017-1330	ND
2019-08-29	4790-029-0945	ND
2019-09-10	4790-010-0930	ND
2019-09-17	4790-031-0930	ND
2019-09-19	4790-025-0915	ND
2019-09-19	4790-026-1020	ND
2019-09-30	4790-022-0910	ND
2019-09-30	4790-012-1320	ND