Know Your Environment. Protect Your Health.

Glyphosate

City of Lewiston

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND50ND
2020ND60ND
2021ND50ND
2022ND30ND
2023ND10ND

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
2018-02-21S180221045-001ND
2018-02-22S180223004-001ND
2018-12-13S181213011-002ND
2018-12-13S181213011-001ND
2019-01-24S190124017-001ND
2019-04-23S190423067-001ND
2019-04-23S190423067-002ND
2019-08-14S190814080-001ND
2019-08-14S190814075-003ND
2020-02-19S200219035-001ND
2020-07-28SMAG0811-08ND
2020-07-28SMAG0811-07ND
2020-07-28SMAG0811-05ND
2020-07-28SMAG0811-03ND
2020-07-28SMAG0811-01ND
2021-06-29SMBF0852-03ND
2021-06-29SMBF0852-01ND
2021-06-29SMBF0852-07ND
2021-06-29SMBF0852-06ND
2021-06-29SMBF0852-04ND
2022-06-28SMCF0954-01ND
2022-09-21SMCI0682-01ND
2022-11-21SMCK0693-01ND
2023-01-18SMDA0450-01ND