2,4,5-TP (Silvex)

Epcor Water - Sun City

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	N/A	0	N/A
2015	ND	16	ND
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	ND	16	ND
2019	N/A	0	N/A

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
2015-01-15	5011290-01S	ND
2015-01-15	5011289-01	ND
2015-01-22	5011809-01S	ND
2015-02-05	5020637-01S	ND
2015-02-05	5020636-01S	ND
2015-03-05	5030501-01S	ND
2015-06-02	5060272-01S	ND
2015-06-11	5061157-01	ND
2015-07-21	5071938-01S	ND
2015-07-21	5071937-01	ND
2015-07-29	5072657-01	ND
2015-08-07	5080692-01	ND
2015-08-07	5080691-01	ND
2015-08-12	5081113-01	ND
2015-10-09	5101232-01	ND
2015-10-09	5101233-01T	ND
2018-02-05	18B0335-01 SOC	ND
2018-02-05	18B0334-01 SOC	ND
2018-02-12	18B1066-01	ND
2018-02-12	18B1065-01 IOC	ND
2018-02-15	18B1536-01 SOC	ND
2018-02-15	18B1535-01 SOC	ND
2018-02-16	18B1612-01 SOC	ND
2018-06-13	18F1372-01 SOC	ND
2018-08-01	18H0152-01 SOC	ND
2018-08-01	18H0151-01 SOC	ND
2018-08-14	18H1524-01 SOC	ND
2018-08-14	18H1518-01 SOC	ND
2018-08-20	18H2046-01 SOC	ND
2018-08-20	18H2041-01 SOC	ND
2018-08-31	18H3241-01 SOC	ND
2018-11-06	18K0561-01 SOC	ND