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EWG's Tap Water Database — 2021 UPDATE

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Dalapon

Harris County Municipal Utility District 156

NOTE: Harris County Municipal Utility District 156 purchases water from Harris County Municipal Utility District 155 which is required to test for dalapon. Sample information shown below was taken by Harris County Municipal Utility District 155.

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

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND10ND
2016ND10ND
2017ND10ND
2018ND10ND
2019ND10ND

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

NOTE: Harris County Municipal Utility District 156 purchases water from Harris County Municipal Utility District 155 which is required to test for dalapon. Sample information shown below was taken by Harris County Municipal Utility District 155.

Date Lab ID Result
2014-03-05AC45701ND
2014-04-23AC51515ND
2014-04-23AC51545ND
2014-07-28AC61094ND
2014-12-10AC74341ND
2015-03-12AC84076ND
2015-06-22AC96786ND
2015-08-18AD04531ND
2015-12-09AD16215ND
2016-03-07AD27223ND
2016-05-10AD36069ND
2016-10-25AD54610ND
2016-11-16AD58301ND
2017-02-06AD68722ND
2017-02-06AD68902ND
2017-04-24AD80679ND
2017-08-03AD92050ND
2017-11-14AE04737ND
2018-02-06AE12492ND
2018-06-06AE28857ND
2018-08-27AE38526ND
2018-11-29AE47394ND
2019-02-04AE52678ND
2019-05-23AE67959ND
2019-08-01AE76799ND
2019-10-16AE86759ND