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EWG's Tap Water Database — 2021 UPDATE

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Endothall

Parker WSD

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

 

66

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND20ND
2015ND320ND
2016ND80ND
2017ND60ND
2018N/A00N/A
2019ND180ND

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 Result
2014-06-12ND
2014-06-16ND
2015-03-19ND
2015-03-26ND
2015-03-30ND
2015-04-15ND
2015-04-15ND
2015-04-27ND
2015-05-21ND
2015-05-21ND
2015-06-10ND
2015-06-10ND
2015-06-16ND
2015-06-17ND
2015-06-17ND
2015-06-24ND
2015-06-24ND
2015-07-29ND
2015-08-13ND
2015-08-13ND
2015-08-20ND
2015-08-20ND
2015-08-20ND
2015-08-26ND
2015-09-01ND
2015-09-01ND
2015-09-01ND
2015-09-03ND
2015-09-10ND
2015-09-15ND
2015-09-15ND
2015-09-15ND
2015-09-16ND
2015-10-21ND
2016-01-28ND
2016-05-03ND
2016-07-14ND
2016-07-18ND
2016-07-28ND
2016-10-04ND
2016-10-18ND
2016-10-18ND
2017-06-08ND
2017-07-18ND
2017-07-24ND
2017-07-26ND
2017-07-31ND
2017-10-23ND
2019-04-16ND
2019-04-16ND
2019-04-17ND
2019-04-22ND
2019-04-23ND
2019-04-24ND
2019-04-25ND
2019-04-25ND
2019-08-26ND
2019-08-27ND
2019-08-29ND
2019-08-29ND
2019-09-05ND
2019-09-11ND
2019-09-16ND
2019-09-23ND
2019-09-25ND
2019-10-02ND