Endothall

Swta - Main System

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

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	ND	14	ND
2015	N/A	0	N/A
2016	N/A	0	N/A
2017	ND	14	ND
2018	N/A	0	N/A
2019	N/A	0	N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-04-16	14042681-001	ND
2014-04-16	14042689-001	ND
2014-04-16	14042665-001	ND
2014-04-16	14042700-001	ND
2014-04-23	14043828-001	ND
2014-04-23	14043829-001	ND
2014-04-23	14043830-001	ND
2014-09-03	14090175-001	ND
2014-09-03	14090194-001	ND
2014-09-03	14090174-001	ND
2014-09-03	14090193-001	ND
2014-09-10	14091044-001	ND
2014-09-10	14091038-001	ND
2014-09-10	14091043-001	ND
2017-04-18	15985890	ND
2017-04-18	15986032	ND
2017-04-18	15985844	ND
2017-04-18	15985792	ND
2017-04-18	15985739	ND
2017-04-18	15985982	ND
2017-04-18	15985930	ND
2017-07-25	16613175	ND
2017-07-25	16613203	ND
2017-07-25	16613231	ND
2017-07-25	16613315	ND
2017-07-25	16613342	ND
2017-07-25	16613259	ND
2017-07-25	16613287	ND