Endothall

Lihue-Kapaa

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
2014	ND	1	ND
2015	N/A	0	N/A
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	ND	35	ND
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
2014-03-25	201403280346	ND
2018-05-29	201805310728	ND
2018-05-29	201805310727	ND
2018-06-06	201806090374	ND
2018-06-06	201806090380	ND
2018-06-06	201806090381	ND
2018-06-06	201806090373	ND
2018-06-12	201806140887	ND
2018-06-12	201806141145	ND
2018-06-12	201806141144	ND
2018-06-12	201806140889	ND
2018-06-13	201806150527	ND
2018-06-13	201806150518	ND
2018-06-13	201806150684	ND
2018-06-13	201806150685	ND
2018-06-13	201806150729	ND
2018-06-13	201806150730	ND
2018-07-12	201807000000	ND
2018-07-12	201807130880	ND
2018-11-26	201811280312	ND
2018-11-26	201811280331	ND
2018-11-26	201811280311	ND
2018-11-26	201811280330	ND
2018-11-27	201811290380	ND
2018-11-27	201811290211	ND
2018-11-27	201811290212	ND
2018-11-27	201811290381	ND
2018-11-28	201811300187	ND
2018-11-28	201811300186	ND
2018-12-03	201812050453	ND
2018-12-03	201812050458	ND
2018-12-03	201812050355	ND
2018-12-03	201812050336	ND
2018-12-03	201812050356	ND
2018-12-03	201812050335	ND
2018-12-04	201812060388	ND