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EWG's Tap Water Database — 2021 UPDATE

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Dalapon

San Antonio Water System Northeast

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

 

111

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
2014ND190ND
2015ND160ND
2016ND160ND
2017ND200ND
2018ND160ND
2019ND240ND

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
2014-02-14AC43100ND
2014-02-14AC43106ND
2014-02-14AC43044ND
2014-02-14AC43048ND
2014-04-02AC49124ND
2014-04-02AC49095ND
2014-04-02AC49085ND
2014-04-02AC49106ND
2014-07-02AC58767ND
2014-07-02AC58764ND
2014-07-02AC58774ND
2014-07-02AC58775ND
2014-09-02AC65476ND
2014-09-02AC65475ND
2014-09-02AC65473ND
2014-10-02AC68793ND
2014-10-02AC68794ND
2014-10-02AC68790ND
2014-10-02AC68767ND
2015-01-15AC76420ND
2015-01-15AC76444ND
2015-01-15AC76443ND
2015-01-15AC76429ND
2015-05-01AC90234ND
2015-05-01AC90254ND
2015-05-01AC90248ND
2015-05-01AC90249ND
2015-07-08AC98706ND
2015-07-08AC98710ND
2015-07-08AC98709ND
2015-07-08AC98708ND
2015-10-14AD10598ND
2015-10-14AD10591ND
2015-10-14AD10586ND
2015-10-14AD10599ND
2016-01-12AD17559ND
2016-01-12AD17563ND
2016-01-12AD17533ND
2016-01-12AD17532ND
2016-04-04AD31635ND
2016-04-04AD31639ND
2016-04-04AD31634ND
2016-04-04AD31636ND
2016-07-20AD44880ND
2016-07-20AD44875ND
2016-07-20AD44870ND
2016-07-20AD44878ND
2016-10-12AD53118ND
2016-10-12AD53120ND
2016-10-12AD53119ND
2016-10-12AD53135ND
2017-01-05AD63349ND
2017-01-05AD63347ND
2017-01-05AD63346ND
2017-01-05AD63192ND
2017-01-05AD63196ND
2017-01-05AD63190ND
2017-01-05AD63193ND
2017-04-03AD78036ND
2017-04-03AD78034ND
2017-04-03AD78037ND
2017-04-03AD78039ND
2017-07-07AD88653ND
2017-07-07AD88636ND
2017-07-07AD88637ND
2017-07-07AD88630ND
2017-12-04AE06545ND
2017-12-04AE06537ND
2017-12-04AE06542ND
2017-12-04AE06543ND
2017-12-13AE07709ND
2018-01-18AE09212ND
2018-01-18AE09213ND
2018-01-18AE09223ND
2018-01-18AE09220ND
2018-04-19AE23195ND
2018-04-19AE23204ND
2018-04-19AE23199ND
2018-04-19AE23196ND
2018-08-31AE39130ND
2018-08-31AE39128ND
2018-08-31AE39131ND
2018-08-31AE39129ND
2018-11-20AE46652ND
2018-11-20AE46655ND
2018-11-20AE46654ND
2018-11-20AE46653ND
2019-01-28AE51591ND
2019-01-28AE51590ND
2019-01-28AE51588ND
2019-01-28AE51589ND
2019-04-22AE63146ND
2019-04-22AE63148ND
2019-04-22AE63147ND
2019-04-22AE63149ND
2019-07-26AE76121ND
2019-07-26AE76124ND
2019-07-26AE76126ND
2019-07-26AE76122ND
2019-07-26AE76120ND
2019-07-26AE76123ND
2019-07-26AE76125ND
2019-07-26AE76163ND
2019-10-29AE87840ND
2019-10-29AE87846ND
2019-10-29AE87855ND
2019-10-29AE87843ND
2019-10-29AE87861ND
2019-10-29AE87842ND
2019-10-29AE87844ND
2019-10-29AE87845ND