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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Sands Point

2(2,4,5-trichlorophenoxy) propionic acid (2,4,5-TP or Silvex) is a cancer-causing herbicide banned in the U.S. in 1985 because of its toxicity. It is still detected as a groundwater contaminant in areas where it was sprayed or stored.

MORE ABOUT THIS CONTAMINANT

 

34

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND50ND
2015ND60ND
2016ND70ND
2017ND20ND
2018ND80ND
2019ND60ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 3 ppb

The EWG Health Guideline of 3 ppb for 2,4,5-TP was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 50 ppb

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-111403744-002-SOCSND
2014-03-111403744-004-SOCSND
2014-03-111403744-003-SOCSND
2014-03-111403744-001-SOCSND
2014-03-131403952-001-SOCSND
2015-11-171511D88-003-SOCSND
2015-11-171511D88-001-SOCSND
2015-11-171511D88-002-SOCSND
2015-11-171511D88-004-SOCSND
2015-12-141512B49-001A-SOCND
2015-12-141512B49-001-SOCSND
2016-11-16704941001ND
2016-12-01705824005ND
2016-12-01705824001AND
2016-12-01705824001ND
2016-12-01705824002ND
2016-12-01705824003ND
2016-12-01705824004ND
2017-03-217013841001ND
2017-05-187019049001-SOCSND
2018-10-237068805002-SOCSND
2018-10-237068805001-POCSND
2018-10-237068805003-SOCSND
2018-10-237068805006-SOCSND
2018-10-237068805004-SOCSND
2018-10-237068805005-SOCSND
2018-11-287072266001-SOCSND
2018-11-287072272001-SOCSND
2019-11-1270111549002ND
2019-11-1270111549001ND
2019-11-1270111549004ND
2019-11-1270111549006ND
2019-11-1270111549005ND
2019-11-1270111549003ND