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EWG's Tap Water Database — 2019 UPDATE

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2,4,5-TP (Silvex)

Oyster Bay Water District

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND50ND
2013N/A00N/A
2014ND50ND
2015ND50ND
2016ND50ND
2017ND50ND

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
2012-12-191212988-001-SOCSND
2012-12-191212988-002-SOCSND
2012-12-191212988-004-SOCSND
2012-12-191212988-003-SOCSND
2012-12-211212B33-001-SOCSND
2014-06-041406268-001-SOCSND
2014-06-041406268-003-SOCSND
2014-06-041406268-002-SOCSND
2014-06-041406268-004-SOCSND
2014-06-041406268-005-SOCSND
2015-05-201505E61-001-SOCSND
2015-05-201505E61-004-SOCSND
2015-05-201505E61-005-SOCSND
2015-05-201505E61-002-SOCSND
2015-05-201505E61-003-SOCSND
2016-06-281606Q85-003-SOCSND
2016-06-281606Q85-002-SOCSND
2016-06-281606Q85-001-SOCSND
2016-06-281606Q85-004-SOCSND
2016-06-291606S10-001-SOCSND
2017-06-277022481001ND
2017-06-277022481004ND
2017-06-277022481002ND
2017-06-277022481005ND
2017-06-277022481003ND