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EWG's Tap Water Database — 2021 UPDATE

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Dalapon

Northwest Harris County MUD 5

The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.

MORE ABOUT THIS CONTAMINANT

 

35

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND50ND
2015ND20ND
2016ND20ND
2017ND100ND
2018ND80ND
2019ND80ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 200 ppb

The legal limit for dalapon, established in 1992, was based on a toxicity study in laboratory animals published in 1960.

ppb = parts per billion

All test results

Date Lab ID Result
2014-06-16AC56980ND
2014-06-16AC56979ND
2014-10-14AC69615ND
2014-10-14AC69614ND
2014-10-14AC69616ND
2015-07-28AD01196ND
2015-07-28AD01199ND
2016-09-19AD50085ND
2016-09-19AD49999ND
2017-06-09AD86988ND
2017-06-09AD86984ND
2017-08-08AD92369ND
2017-08-08AD92370ND
2017-08-08AD92454ND
2017-09-26AD98112ND
2017-09-26AD98111ND
2017-09-26AD98113ND
2017-10-18AE01307ND
2017-10-18AE01309ND
2018-02-07AE12729ND
2018-02-07AE12726ND
2018-05-10AE25895ND
2018-05-10AE25896ND
2018-08-01AE35262ND
2018-08-01AE35257ND
2018-11-19AE46451ND
2018-11-19AE46448ND
2019-02-05AE52892ND
2019-02-05AE52895ND
2019-05-20AE67074ND
2019-05-20AE67092ND
2019-07-19AE75262ND
2019-07-19AE75264ND
2019-10-24AE87555ND
2019-10-24AE87556ND