Know Your Environment. Protect Your Health.

Glyphosate

CTWC - Shoreline Region-Guilford 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.

 

32

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND150ND
2020N/A00N/A
2021ND10ND
2022ND150ND
2023N/A00N/A

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
2018-07-09CA86688ND
2019-01-30SOC 200520057ND
2019-06-06SOC 200535308ND
2019-06-06SOC 200535309ND
2019-06-11SOC 200536055ND
2019-06-11SOC 200536054ND
2019-06-19SOC 200542695ND
2019-06-24SOC 200537520ND
2019-07-29SOC 200542348ND
2019-07-30SOC 200542453ND
2019-07-31SOC 200542480ND
2019-07-31SOC 200542466ND
2019-07-31SOC 200542497ND
2019-07-31SOC 200542499ND
2019-07-31SOC 200542468ND
2019-08-14SOC 200544869ND
2021-09-30S300072074 300072091ND
2022-06-14CL56474ND
2022-06-14CL56470ND
2022-06-14CL56472ND
2022-06-15CL57887ND
2022-06-15CL57885ND
2022-06-22CL62297ND
2022-06-28CL66245ND
2022-07-18CL80434ND
2022-07-18CL80436ND
2022-07-18CL80438ND
2022-07-18CL80432ND
2022-07-25CL88838ND
2022-07-25CL88842ND
2022-08-29CM17828ND
2022-10-19CM66672ND