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EWG's Tap Water Database — 2019 UPDATE

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2,4,5-TP (Silvex)

Freeport

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013N/A00N/A
2014ND30ND
2015ND50ND
2016N/A00N/A
2017N/A00N/A

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
2012-01-231201B48-001AND
2012-01-231201B48-004AND
2012-04-251204C70-001AND
2012-04-251204C70-004AND
2014-04-151404984-001AND
2014-07-151407A33-001AND
2014-10-141410806-001AND
2015-01-201501B51-001CND
2015-01-201501B51-003CND
2015-01-211501B51-006CND
2015-05-261505K11-001CND
2015-05-261505K11-004CND