2,4,5-TP (Silvex)

Cape Fear Public Utility Authority - Wilmington

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

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Range of results
2013	N/A	0	N/A
2014	ND	4	ND
2015	ND	8	ND
2016	ND	3	ND
2017	ND	2	ND
2018	ND	9	ND
2019	ND	9	ND

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
2014-02-05	201402060612	ND
2014-05-07	201405090681	ND
2014-08-06	201408070253	ND
2014-11-05	201411060235	ND
2015-02-12		ND
2015-04-13		ND
2015-05-12		ND
2015-07-08		ND
2015-08-17		ND
2015-08-17		ND
2015-11-12		ND
2015-11-16		ND
2016-04-07	3427045	ND
2016-11-01	3577048	ND
2016-11-01	3577060	ND
2017-01-17	3622926	ND
2017-01-17	3622932	ND
2018-02-13	3871684	ND
2018-04-30	3925326	ND
2018-05-09	3932361	ND
2018-07-10	92391593001SOC	ND
2018-07-12	92391890001SOC	ND
2018-08-02	92394426001SOC	ND
2018-11-07	4114204	ND
2018-11-07	4114582	ND
2018-12-17	4152240	ND
2019-02-05	4189337	ND
2019-05-07	4286100	ND
2019-08-06	4377268	ND
2019-09-16	4424754	ND
2019-09-23	4434024	ND
2019-09-26	37729_19-41714	ND
2019-10-01	4441898	ND
2019-10-01	4443206	ND
2019-10-01	4443223	ND