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EWG's Tap Water Database — 2021 UPDATE

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Dalapon

East Rio Hondo Water Supply Corporation Arroyo City

NOTE: East Rio Hondo Water Supply Corporation Arroyo City purchases water from East Rio Hondo WSC which is required to test for dalapon. Sample information shown below was taken by East Rio Hondo WSC.

The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.

 

101

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND40ND
2016ND40ND
2017ND40ND
2018ND40ND
2019ND40ND

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: East Rio Hondo Water Supply Corporation Arroyo City purchases water from East Rio Hondo WSC which is required to test for dalapon. Sample information shown below was taken by East Rio Hondo WSC.

Date Lab ID Result
2014-03-06AC45935ND
2014-03-06AC45971ND
2014-03-06AC45939ND
2014-03-06AC45933ND
2014-06-06AC56285ND
2014-06-06AC56312ND
2014-06-06AC56282ND
2014-06-06AC56313ND
2014-09-09AC66373ND
2014-09-09AC66412ND
2014-09-09AC66372ND
2014-09-09AC66413ND
2014-11-20AC72650ND
2014-11-20AC72642ND
2014-11-20AC72644ND
2014-11-20AC72661ND
2015-03-18AC84977ND
2015-03-18AC84973ND
2015-03-18AC84970ND
2015-03-18AC84981ND
2015-06-17AC96248ND
2015-06-17AC96275ND
2015-06-17AC96249ND
2015-06-17AC96247ND
2015-09-23AD08188ND
2015-09-23AD08184ND
2015-09-23AD08202ND
2015-09-23AD08187ND
2015-12-01AD14855ND
2015-12-01AD14906ND
2015-12-01AD14856ND
2015-12-01AD14859ND
2016-02-25AD25845ND
2016-02-25AD25679ND
2016-02-25AD25704ND
2016-02-25AD25699ND
2016-02-25AD25678ND
2016-05-17AD36988ND
2016-05-17AD36987ND
2016-05-17AD36990ND
2016-05-17AD36989ND
2016-09-27AD51484ND
2016-09-27AD51437ND
2016-09-27AD51454ND
2016-09-27AD51483ND
2016-12-09AD61621ND
2016-12-09AD61624ND
2016-12-09AD61622ND
2016-12-09AD61623ND
2017-03-03AD73410ND
2017-03-03AD73409ND
2017-03-03AD73408ND
2017-03-03AD73407ND
2017-05-19AD85036ND
2017-05-19AD85035ND
2017-05-19AD85029ND
2017-05-19AD85032ND
2017-09-07AD95115ND
2017-09-07AD95103ND
2017-09-07AD95099ND
2017-09-07AD95104ND
2017-11-30AE06322ND
2017-11-30AE06330ND
2017-11-30AE06326ND
2017-11-30AE06329ND
2018-02-01AE11801ND
2018-02-01AE11799ND
2018-02-01AE11798ND
2018-03-07AE17236ND
2018-06-05AE28648ND
2018-06-05AE28644ND
2018-06-05AE28649ND
2018-06-05AE28643ND
2018-08-28AE38677ND
2018-08-28AE38675ND
2018-08-28AE38676ND
2018-08-28AE38678ND
2018-08-28AE38707ND
2018-11-29AE47373ND
2018-11-29AE47375ND
2018-11-29AE47367ND
2018-11-29AE47376ND
2018-11-29AE47425ND
2019-02-19AE55117ND
2019-02-19AE55026ND
2019-02-19AE55016ND
2019-02-19AE55017ND
2019-02-19AE55024ND
2019-06-06AE69525ND
2019-06-06AE69410ND
2019-06-06AE69407ND
2019-06-06AE69409ND
2019-06-06AE69406ND
2019-07-18AE74987ND
2019-07-18AE74988ND
2019-07-18AE74983ND
2019-07-18AE74984ND
2019-11-26AE90563ND
2019-11-26AE90562ND
2019-11-26AE90575ND
2019-11-26AE90573ND