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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

City of Watsonville

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

 

29

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016ND280ND
2017N/A00N/A
2018N/A00N/A
2019ND10ND

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
2016-03-159590-009-1015ND
2016-03-159590-013-0915ND
2016-03-159590-014-1120ND
2016-03-159590-012-1015ND
2016-03-159590-011-1205ND
2016-03-159590-015-1050ND
2016-03-159590-010-0950ND
2016-03-159590-016-1120ND
2016-03-159590-007-1145ND
2016-03-159590-029-1050ND
2016-03-159590-006-0930ND
2016-03-159590-030-0830ND
2016-06-149590-011-1315ND
2016-06-149590-015-1300ND
2016-06-149590-016-1020ND
2016-06-149590-014-0850ND
2016-06-149590-029-1000ND
2016-06-149590-030-1020ND
2016-06-149590-013-0840ND
2016-06-149590-012-1220ND
2016-06-149590-004-1210ND
2016-06-149590-010-0950ND
2016-06-149590-009-1050ND
2016-06-149590-007-1045ND
2016-06-149590-006-0910ND
2016-06-209590-005-1510ND
2016-09-139590-005-1440ND
2016-09-139590-004-1400ND
2019-04-309590-006-0750ND