Know Your Environment. Protect Your Health.

Endothall

Guilford Water Authority

Endothall is a herbicide used to kill aquatic plants and algae. It's also used on potato and cotton crops.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020ND60ND
2021N/A00N/A
2022N/A00N/A
2023ND100ND

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 94 ppb

The EWG Health Guideline of 94 ppb for endothall was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to the stomach and intestines.

EPA Maximum Contaminant
Level (MCL): 100 ppb

The legal limit for endothall, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1960s.

ppb = parts per billion

All test results

Date Lab ID Result
2018-05-298055384-01ND
2018-09-048091925-01ND
2018-12-118122846-01ND
2019-03-059032320-01ND
2020-06-0922559580.00ND
2020-06-0922559550.00ND
2020-06-0922559520.00ND
2020-09-0923136522.00ND
2020-09-0923136548.00ND
2020-09-0923136578.00ND
2023-05-1729053244.00ND
2023-05-1729053260.00ND
2023-05-1729053276.00ND
2023-05-2429053445.00ND
2023-05-2429053412.00ND
2023-08-0129651161.00ND
2023-08-0129651160.00ND
2023-08-2229651293.00ND
2023-08-2229651291.00ND
2023-08-2229651292.00ND