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EWG's Tap Water Database — 2021 UPDATE

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Dalapon

St. Louis City

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

 

44

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
2015ND40ND
2016ND100ND
2017ND80ND
2018ND100ND
2019ND100ND

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
2014-06-02AC23739ND
2014-06-02AC23738ND
2015-06-01AC47107ND
2015-06-01AC47106ND
2015-09-22CRCW092215M515ND
2015-09-22HBCB092215M515ND
2016-03-03HBCB030316M515ND
2016-03-04CRCW030416M515ND
2016-06-06AC75865ND
2016-06-06AC75864ND
2016-06-08HBCB060816M515ND
2016-06-08CRCW060816M515ND
2016-09-30HBCB093016M515ND
2016-09-30CRCW093016M515ND
2016-12-28CRCW122816M515ND
2016-12-28HBCB122816M515ND
2017-05-19AC98044ND
2017-05-19AC98045ND
2017-06-21AC99039ND
2017-06-21AC99038ND
2017-09-29HBCB092917M515ND
2017-09-29CRCW092917M515ND
2017-11-15CRCW111517M515ND
2017-11-15HBCB111517M515ND
2018-01-18CRCW011918M515ND
2018-01-18HBCB011918M515ND
2018-04-27HBCB042718M515ND
2018-05-08CRCW050818M515ND
2018-05-21AD20859ND
2018-05-21AD20860ND
2018-07-26HBCB072618M515ND
2018-07-31CRCW073118M515ND
2018-10-15HBCB101518M515ND
2018-10-16CRCW101618M515ND
2019-01-15CRCW011519M515ND
2019-01-15HBCB011519M515ND
2019-05-11CRCW051119M515ND
2019-05-11HBCB051119M515ND
2019-05-28AD47824ND
2019-05-28AD47825ND
2019-07-16CRCW071618M515ND
2019-07-16HBCB071618M515ND
2019-10-31CRCW103119M515ND
2019-10-31HBCB103119M515ND