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EWG's Tap Water Database

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2,4,5-TP (Silvex)

North Las Vegas Utilities

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.

 

27

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010ND40ND
2011ND20ND
2012ND90ND
2013ND30ND
2014ND60ND
2015ND30ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 3 ppb

The 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.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 50 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)50.0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-01-0510010024-001ND
2010-04-2710040513-001ND
2010-07-1910070317-001ND
2010-10-2010100421-001ND
2011-06-0711060136-006ND
2011-08-1511080300-001ND
2012-03-2812030534-001ND
2012-05-2312050556-001ND
2012-06-1912060405-002ND
2012-06-2712060583-001ND
2012-09-1312090216-001ND
2012-09-1812090321-001ND
2012-09-1812090321-002ND
2012-09-2612090472-001ND
2012-12-2612120416-001ND
2013-03-0713030080-001ND
2013-10-1613100247-001ND
2013-10-1613100247-002ND
2014-02-1114020154-001ND
2014-06-2514060515-001ND
2014-07-3114070542-001ND
2014-08-2014080323-001ND
2014-08-2514080385-001ND
2014-09-2414090437-001ND
2015-06-1715060305-001ND
2015-07-1515070291-002ND
2015-07-1515070291-001ND