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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

City of Idaho Falls

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

 

31

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
2014ND10ND
2015N/A00N/A
2016ND30ND
2017ND230ND
2018ND20ND
2019ND20ND

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
2014-02-27B17021888-003ND
2016-12-13SB16121040003ND
2016-12-13SB16121040002ND
2016-12-13SB16121040001ND
2017-02-27SB17021888003ND
2017-02-27SB17021888002ND
2017-02-27SB17021888001ND
2017-03-30SB17032436001ND
2017-06-13SB17061702002ND
2017-06-13B17061702009ND
2017-06-13B17061702005ND
2017-06-13SB17061702008ND
2017-06-13SB17061702006ND
2017-06-13SB17061702005ND
2017-06-13SB17061702004ND
2017-06-13SB17061702003ND
2017-06-13SB17061702001ND
2017-06-13SB17061702007ND
2017-06-13SB17061702009ND
2017-06-13SB17061702010ND
2017-08-07SB17080956005ND
2017-08-07SB17080956004ND
2017-08-07SB17080956001ND
2017-08-07SB17080956003ND
2017-08-07SB17080956002ND
2017-08-07SB17080956006ND
2017-08-07SB17080956007ND
2018-09-18SB18091727001ND
2018-10-10SB18101095001ND
2019-03-25SB19032049001ND
2019-04-16SB19041514001ND