2,4,5-TP (Silvex)

City of Tulare

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	10	ND
2015	ND	4	ND
2016	N/A	0	N/A
2017	N/A	0	N/A
2018	ND	13	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
2014-08-28	5810-047-0845	ND
2014-08-28	5810-017-0715	ND
2014-08-28	5810-015-0755	ND
2014-08-28	5810-014-0645	ND
2014-08-28	5810-002-0730	ND
2014-08-28	5810-001-0840	ND
2014-12-10	5810-048-0915	ND
2014-12-10	5810-033-0800	ND
2014-12-10	5810-026-1120	ND
2014-12-10	5810-025-1025	ND
2015-06-26	5810-001-1130	ND
2015-06-26	5810-002-0740	ND
2015-06-26	5810-008-0845	ND
2015-06-26	5810-012-1015	ND
2018-09-20	5810-001-0930	ND
2018-09-20	5810-073-0730	ND
2018-09-20	5810-052-0715	ND
2018-09-20	5810-048-0830	ND
2018-09-20	5810-047-0830	ND
2018-09-20	5810-033-0820	ND
2018-12-20	5810-073-0812	ND
2018-12-20	5810-069-1015	ND
2018-12-20	5810-065-0845	ND
2018-12-20	5810-061-0855	ND
2018-12-20	5810-057-1300	ND
2018-12-20	5810-056-1220	ND
2018-12-20	5810-017-1020	ND