Endothall

Daphne

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	N/A	0	N/A
2015	N/A	0	N/A
2016	ND	14	ND
2017	N/A	0	N/A
2018	ND	2	ND
2019	ND	14	ND

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
2016-01-13	160114023-2	ND
2016-01-13	160114023-1	ND
2016-01-13	160114023-3	ND
2016-01-13	160114023-4	ND
2016-04-13	160414034-1	ND
2016-04-13	160414034-6	ND
2016-04-13	160414034-3	ND
2016-04-13	160414034-4	ND
2016-04-13	160414034-5	ND
2016-04-13	160414034-2	ND
2016-04-13	160413097-1	ND
2016-07-13	160714055-3	ND
2016-07-13	160714055-2	ND
2016-07-13	160714055-1	ND
2018-09-25	18090666-001G	ND
2018-11-05	18110114-001G	ND
2019-01-16	19010493-002G	ND
2019-01-16	19010493-001G	ND
2019-01-16	19010493-003G	ND
2019-04-08	19040337-001	ND
2019-04-08	19040337-002	ND
2019-06-13	20108289002_ISOC	ND
2019-06-13	20108289001_ISOC	ND
2019-06-13	20108289003_ISOC	ND
2019-09-12	20121489003_ISOC	ND
2019-09-12	20121489002_ISOC	ND
2019-09-12	20121489001_ISOC	ND
2019-10-14	20126124002_ISOC	ND
2019-10-14	20126124001_ISOC	ND
2019-11-18	20131097001_ISOC	ND