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EWG's Tap Water Database — 2019 UPDATE

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Endothall

Pennsylvania American Royersford

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

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND100ND
2015N/A00N/A
2016N/A00N/A
2017ND100ND

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
2014-04-0225339901ND
2014-04-0225340101ND
2014-04-0325339801ND
2014-04-0325340201ND
2014-06-2525340401ND
2014-08-0526516601ND
2014-08-0526516201ND
2014-08-0626516401ND
2014-08-0626516701ND
2014-08-1226516501ND
2017-04-1115931545ND
2017-04-1115931515ND
2017-04-1115931487ND
2017-04-1115931459ND
2017-04-1115931431ND
2017-08-1516560821ND
2017-08-1516560849ND
2017-08-1516560793ND
2017-08-1616560877ND
2017-08-3116721932ND