Know Your Environment. Protect Your Health.

Glyphosate

Lone Grove

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.

 

80

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND110ND
2019ND180ND
2020ND140ND
2021ND120ND
20220.742 ppb121ND - 8.90 ppb
2023ND130ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-08-141808951ND
2018-08-2118081133ND
2018-08-2118081132ND
2018-08-2118081131ND
2018-08-2818081348ND
2018-12-161812434ND
2018-12-161812433ND
2018-12-161812438ND
2018-12-161812437ND
2018-12-161812436ND
2018-12-161812435ND
2019-03-191903510ND
2019-03-191903509ND
2019-03-201903508ND
2019-03-271903674ND
2019-03-271903673ND
2019-06-261906848ND
2019-06-261906847ND
2019-06-261906844ND
2019-06-261906845ND
2019-06-261906846ND
2019-09-241909826ND
2019-09-241909828ND
2019-09-241909827ND
2019-09-241909825ND
2019-09-241909824ND
2019-09-241909823ND
2019-11-031911037ND
2019-11-031911036ND
2020-01-062001082ND
2020-01-062001081ND
2020-02-022002013ND
2020-02-022002012ND
2020-03-01100009-01ND
2020-03-01100010-01ND
2020-04-05100477-01ND
2020-04-05100478-01ND
2020-07-05101705-01ND
2020-07-05101704-01ND
2020-07-12101838-01ND
2020-07-12101837-01ND
2020-07-14101902-01ND
2020-07-14101901-01ND
2021-04-06105646-01ND
2021-04-06105645-01ND
2021-05-04106063-01ND
2021-05-04106062-01ND
2021-06-06106611-01ND
2021-06-06106612-01ND
2021-08-22107816-01ND
2021-08-22107815-01ND
2021-08-29107892-01ND
2021-08-29107891-01ND
2021-09-06107988-01ND
2021-09-06107987-01ND
2022-02-08110199-01ND
2022-04-24111303-01ND
2022-04-24111302-01ND
2022-05-01111379-01ND
2022-05-01111380-01ND
2022-05-10111565-01ND
2022-08-07112836-01ND
2022-08-07112837-01ND
2022-09-11113346-01ND
2022-09-11113345-01ND
2022-10-02113678-018.90 ppb
2022-10-02113677-01ND
2023-02-12115486-01ND
2023-02-12115487-01ND
2023-02-12115489-01ND
2023-04-30116721-01ND
2023-04-30116722-01ND
2023-05-14117026-01ND
2023-05-14117027-01ND
2023-07-04117723-01ND
2023-07-04117724-01ND
2023-09-26119149-01ND
2023-09-26119150-01ND
2023-10-22119564-01ND
2023-10-22119565-01ND