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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Global Water - Santa Cruz Water Company

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015ND20ND
2016N/A00N/A
2017N/A00N/A
2018ND30ND

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
2015-01-12550-38232-1SND
2015-10-21550-53091-1SND
2018-02-01550-97234-1SOCND
2018-07-23550-106542-1ND
2018-11-01550-112696-1 SOCND
2019-02-264211659ND
2019-02-264211660ND
2019-04-184267725ND
2019-07-11550-125915-2 SOCND
2019-10-03550-130768-2 SOCND