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EWG's Tap Water Database — 2021 UPDATE

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Dalapon

Twin Buttes Water System

NOTE: Twin Buttes Water System purchases water from City of San Angelo which is required to test for dalapon. Sample information shown below was taken by City of San Angelo.

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

 

106

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND30ND
2016ND30ND
2017N/A00N/A
2018N/A00N/A
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: Twin Buttes Water System purchases water from City of San Angelo which is required to test for dalapon. Sample information shown below was taken by City of San Angelo.

Date Lab ID Result
2014-02-25AC44451ND
2014-02-25AC44452ND
2014-02-25AC44453ND
2014-02-25AC44458ND
2014-02-25AC44455ND
2014-02-25AC44456ND
2014-02-25AC44459ND
2014-02-25AC44471ND
2014-04-29AC52176ND
2014-04-29AC52180ND
2014-04-29AC52177ND
2014-04-29AC52174ND
2014-04-29AC52175ND
2014-04-29AC52173ND
2014-04-29AC52178ND
2014-04-29AC52179ND
2014-04-29AC52114ND
2014-04-29AC52115ND
2014-04-29AC52107ND
2014-04-29AC52116ND
2014-04-29AC52118ND
2014-04-29AC52106ND
2014-04-29AC52108ND
2014-04-29AC52113ND
2014-08-11AC63232ND
2014-08-11AC63260ND
2014-08-11AC63259ND
2014-08-11AC63208ND
2014-08-11AC63204ND
2014-08-11AC63209ND
2014-08-11AC63203ND
2014-08-11AC63202ND
2014-11-10AC71736ND
2014-11-10AC71733ND
2014-11-10AC71735ND
2014-11-10AC71732ND
2014-11-10AC71734ND
2014-11-10AC71730ND
2014-11-10AC71739ND
2014-11-10AC71737ND
2015-02-02AC78690ND
2015-02-02AC78691ND
2015-02-02AC78705ND
2015-02-02AC78689ND
2015-02-02AC78707ND
2015-02-02AC78706ND
2015-02-02AC78704ND
2015-02-02AC78703ND
2015-05-18AC92308ND
2015-05-18AC92311ND
2015-05-18AC92303ND
2015-05-18AC92312ND
2015-05-18AC92305ND
2015-05-18AC92306ND
2015-05-18AC92309ND
2015-05-18AC92307ND
2015-08-12AD03959ND
2015-08-12AD03964ND
2015-08-12AD03961ND
2015-08-12AD03966ND
2015-08-12AD03963ND
2015-08-12AD03960ND
2015-08-12AD03965ND
2015-08-12AD03957ND
2015-11-05AD12760ND
2015-11-05AD12755ND
2015-11-05AD12762ND
2015-11-05AD12761ND
2015-11-05AD12758ND
2015-11-05AD12754ND
2015-11-05AD12752ND
2015-11-05AD12756ND
2016-02-17AD24472ND
2016-02-17AD24256ND
2016-02-17AD24252ND
2016-02-17AD24250ND
2016-02-17AD24283ND
2016-02-17AD24285ND
2016-02-17AD24281ND
2016-02-17AD24257ND
2016-02-17AD24253ND
2016-05-17AD37015ND
2016-05-17AD37021ND
2016-05-17AD37016ND
2016-05-17AD37014ND
2016-05-17AD37020ND
2016-05-17AD37018ND
2016-05-17AD37019ND
2016-05-17AD37017ND
2016-07-20AD44891ND
2016-07-20AD44885ND
2016-07-20AD44883ND
2016-07-20AD44887ND
2016-07-20AD44888ND
2016-07-20AD44889ND
2016-07-20AD44882ND
2016-07-20AD44890ND
2016-11-09AD57349ND
2016-11-09AD57340ND
2016-11-09AD57345ND
2016-11-09AD57348ND
2016-11-09AD57350ND
2016-11-09AD57343ND
2016-11-09AD57353ND
2016-11-09AD57351ND
2019-05-07Q1920785008ND