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EWG's Tap Water Database — 2021 UPDATE

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Dinoseb

Zachary Water System

Dinoseb is a herbicide that causes birth defects and reproductive difficulties. It has been banned in the U.S. since 1986.

MORE ABOUT THIS CONTAMINANT

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016ND100ND
2017N/A00N/A
2018ND20ND
2019ND160ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 7 ppb

The legal limit for dinoseb, established in 1992, was based on toxicity studies conducted in laboratory animals in the 1970s and 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2016-02-2935232145006ND
2016-02-2935232145006ND
2016-07-2635256952002ND
2016-07-2635256952001ND
2016-07-2635256952002ND
2016-07-2635256952004ND
2016-07-2635256952003ND
2016-07-2635256952001ND
2016-07-2635256952003ND
2016-07-2635256952004ND
2018-11-2635433146001ND
2018-11-2635433146001ND
2019-06-1835476846004ND
2019-06-1835476846003ND
2019-06-1835476846002ND
2019-06-1835476846001ND
2019-06-1835476846004ND
2019-06-1835476846001ND
2019-06-1835476846002ND
2019-06-1835476846003ND
2019-08-1235489898001ND
2019-08-1235489898004ND
2019-08-1235489898003ND
2019-08-1235489898002ND
2019-08-1235489898001ND
2019-08-1235489898004ND
2019-08-1235489898003ND
2019-08-1235489898002ND