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EWG's Tap Water Database — 2021 UPDATE

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Dalapon

City of Katy

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

 

108

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
2014ND220ND
2015ND160ND
2016ND160ND
2017ND220ND
2018ND160ND
2019ND160ND

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
2014-01-23AC40077ND
2014-01-23AC40068ND
2014-01-23AC40070ND
2014-01-23AC40072ND
2014-01-23AC40069ND
2014-01-23AC40081ND
2014-02-24AC44231ND
2014-02-24AC44185ND
2014-02-24AC44184ND
2014-02-24AC44209ND
2014-05-01AC52701ND
2014-05-01AC52664ND
2014-05-01AC52666ND
2014-05-01AC52665ND
2014-07-25AC61213ND
2014-07-25AC61211ND
2014-07-25AC61212ND
2014-07-25AC61215ND
2014-10-27AC70591ND
2014-10-27AC70590ND
2014-10-27AC70553ND
2014-10-27AC70587ND
2015-01-20AC76910ND
2015-01-20AC76925ND
2015-01-20AC76908ND
2015-01-20AC76909ND
2015-05-28AC93758ND
2015-05-28AC93737ND
2015-05-28AC93731ND
2015-05-28AC93759ND
2015-07-14AC99320ND
2015-07-14AC99321ND
2015-07-14AC99322ND
2015-07-14AC99323ND
2015-10-12AD10202ND
2015-10-12AD10218ND
2015-10-12AD10220ND
2015-10-12AD10216ND
2016-01-14AD18166ND
2016-01-14AD18172ND
2016-01-14AD18167ND
2016-01-14AD18169ND
2016-04-08AD32525ND
2016-04-08AD32536ND
2016-04-08AD32501ND
2016-04-08AD32502ND
2016-07-18AD44454ND
2016-07-18AD44471ND
2016-07-18AD44455ND
2016-07-18AD44456ND
2016-10-07AD52793ND
2016-10-07AD52799ND
2016-10-07AD52789ND
2016-10-07AD52797ND
2017-01-10AD63952ND
2017-01-10AD63969ND
2017-01-10AD63966ND
2017-01-10AD63967ND
2017-02-09AD70057ND
2017-02-09AD70058ND
2017-02-09AD70061ND
2017-02-09AD70053ND
2017-02-09AD70062ND
2017-02-09AD70054ND
2017-04-04AD78275ND
2017-04-04AD78276ND
2017-04-04AD78277ND
2017-04-04AD78274ND
2017-07-13AD89291ND
2017-07-13AD89292ND
2017-07-13AD89288ND
2017-07-13AD89286ND
2017-10-09AD99781ND
2017-10-09AD99780ND
2017-10-09AD99787ND
2017-10-09AD99782ND
2018-01-08AE08040ND
2018-01-08AE08041ND
2018-01-08AE08045ND
2018-01-08AE08044ND
2018-04-04AE21192ND
2018-04-04AE21191ND
2018-04-04AE21190ND
2018-04-04AE21193ND
2018-07-06AE32593ND
2018-07-06AE32605ND
2018-07-06AE32590ND
2018-07-06AE32603ND
2018-10-24AE44471ND
2018-10-24AE44472ND
2018-10-24AE44465ND
2018-10-24AE44466ND
2019-01-14AE49538ND
2019-01-14AE49539ND
2019-01-14AE49537ND
2019-01-14AE49540ND
2019-04-05AE61354ND
2019-04-05AE61353ND
2019-04-05AE61355ND
2019-04-05AE61356ND
2019-07-11AE74113ND
2019-07-11AE74095ND
2019-07-11AE74093ND
2019-07-11AE74098ND
2019-10-03AE85642ND
2019-10-03AE85643ND
2019-10-03AE85641ND
2019-10-03AE85644ND