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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Fairfield Sapphire

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

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND20ND
2015ND80ND
2016ND10ND
2017ND20ND
2018ND110ND
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
2014-02-047048-020414-009SND
2014-02-047048-020414-008SND
2015-01-27ND
2015-01-27ND
2015-01-27ND
2015-01-27ND
2015-01-27ND
2015-01-27ND
2015-01-27ND
2015-04-22ND
2016-04-197048-041916-012SND
2017-01-107048-011017-008SND
2017-01-107048-011017-009SND
2018-03-127048-031218-007SND
2018-03-127048-031218-005SND
2018-03-147048-031418-001SND
2018-03-147048-031418-002SND
2018-03-147048-031418-003SND
2018-03-147048-031418-006SND
2018-03-227048-032218-004SND
2018-05-087048-050818-007SND
2018-05-087048-050818-010SND
2018-07-107048-071018-007SND
2018-10-097048-100918-007SND
2019-01-077048-010719-007SND
2019-04-037048-040319-012SND