2,4,5-TP (Silvex)

Oyster Point S/d

NOTE: Oyster Point S/d purchases water from Cape Fear Public Utility Authority - New Hanover County which is required to test for 2,4,5-tp (silvex). Sample information shown below was taken by Cape Fear Public Utility Authority - New Hanover County.

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
2014	ND	2	ND
2015	ND	4	ND
2016	ND	1	ND
2017	ND	2	ND
2018	ND	6	ND
2019	ND	4	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
2014-01-15	201401160704	ND
2014-04-10	201404120236	ND
2015-09-23		ND
2015-09-29		ND
2015-11-12		ND
2015-11-16		ND
2016-07-14	3494005	ND
2016-10-13	3564823	ND
2017-01-17	3622895	ND
2017-04-10	3671290	ND
2018-08-02	92394444001SOC	ND
2018-08-02	92394441001SOC	ND
2018-10-16	4091751	ND
2018-10-16	4091759	ND
2018-11-07	4114200	ND
2018-11-07	4114205	ND
2019-07-25	4365272	ND
2019-09-12	4419231	ND
2019-10-01	4443584	ND
2019-10-01	4441727	ND