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EWG's Tap Water Database — 2019 UPDATE

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Endothall

La Habra Heights County Water District

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

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND70ND
2013ND20ND
2014N/A00N/A
2015ND60ND
2016ND20ND
2017N/A00N/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
2012-03-292706-010-0920ND
2012-03-292706-009-0855ND
2012-04-172706-010-1335ND
2012-04-172706-009-1308ND
2012-07-242706-010-1145ND
2012-07-242706-009-1120ND
2012-08-132706-005-1045ND
2013-02-282706-005-1105ND
2013-04-252706-005-1120ND
2015-04-109588-010-0920ND
2015-04-109588-009-0909ND
2015-07-289588-010-1057ND
2015-07-289588-009-0935ND
2015-09-169588-006-1010ND
2015-12-169588-006-0955ND
2016-03-219588-005-0920ND
2016-06-039588-005-1005ND