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EWG's Tap Water Database — 2021 UPDATE

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Dalapon

Zapata County Waterworks SWTP

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

 

98

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
2016ND170ND
2017ND160ND
2018ND160ND
2019ND170ND

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
2014-02-24AC44492ND
2014-02-24AC44494ND
2014-02-24AC44493ND
2014-02-24AC44491ND
2014-06-11AC56595ND
2014-06-11AC56576ND
2014-06-11AC56575ND
2014-06-11AC56602ND
2014-08-19AC64413ND
2014-08-19AC64416ND
2014-08-19AC64417ND
2014-08-19AC64422ND
2014-12-04AC73647ND
2014-12-04AC73654ND
2014-12-04AC73651ND
2014-12-04AC73659ND
2015-03-18AC84974ND
2015-03-18AC84971ND
2015-03-18AC84969ND
2015-03-18AC84978ND
2015-06-11AC95795ND
2015-06-11AC95759ND
2015-06-11AC95766ND
2015-06-11AC95800ND
2015-09-17AD07560ND
2015-09-17AD07562ND
2015-09-17AD07565ND
2015-09-17AD07568ND
2015-12-14AD16964ND
2015-12-14AD16946ND
2015-12-14AD16961ND
2015-12-14AD16957ND
2016-02-01AD21009ND
2016-02-01AD21189ND
2016-02-01AD21006ND
2016-02-01AD21005ND
2016-02-01AD21008ND
2016-06-22AD41626ND
2016-06-22AD41634ND
2016-06-22AD41624ND
2016-06-22AD41628ND
2016-07-20AD44872ND
2016-07-20AD44869ND
2016-07-20AD44876ND
2016-07-20AD44873ND
2016-10-24AD54547ND
2016-10-24AD54554ND
2016-10-24AD54552ND
2016-10-24AD54555ND
2017-01-23AD66419ND
2017-01-23AD66403ND
2017-01-23AD66402ND
2017-01-23AD66404ND
2017-04-19AD80159ND
2017-04-19AD80160ND
2017-04-19AD80158ND
2017-04-19AD80161ND
2017-09-07AD95106ND
2017-09-07AD95113ND
2017-09-07AD95110ND
2017-09-07AD95107ND
2017-12-07AE07193ND
2017-12-07AE07192ND
2017-12-07AE07182ND
2017-12-07AE07179ND
2018-03-19AE18844ND
2018-03-19AE18847ND
2018-03-19AE18846ND
2018-03-19AE18848ND
2018-05-02AE24799ND
2018-05-02AE24791ND
2018-05-02AE24809ND
2018-05-02AE24771ND
2018-07-18AE33712ND
2018-07-18AE33717ND
2018-07-18AE33710ND
2018-07-18AE33711ND
2018-10-18AE43929ND
2018-10-18AE43930ND
2018-10-18AE43931ND
2018-10-18AE43934ND
2019-03-14AE58404ND
2019-03-14AE58495ND
2019-03-14AE58407ND
2019-03-14AE58406ND
2019-03-14AE58408ND
2019-06-04AE69074ND
2019-06-04AE69072ND
2019-06-04AE69073ND
2019-06-04AE69075ND
2019-08-21AE79817ND
2019-08-21AE79814ND
2019-08-21AE79815ND
2019-08-21AE79816ND
2019-10-28AE87702ND
2019-10-28AE87692ND
2019-10-28AE87683ND
2019-10-28AE87690ND