Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Thousand Trails San Benito Preserve

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND110ND
2019ND10ND
2020N/A00N/A
2021N/A00N/A
2022ND20ND
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-03-28CA3500505_001_001-201803281545ND
2018-03-28CA3500505_002_002-201803281502ND
2018-06-21CA3500505_002_002-201806211138ND
2018-06-21CA3500505_001_001-201806211103ND
2018-06-26CA3500505_005_005-201806260730ND
2018-08-08CA3500505_005_005-201808080712ND
2018-08-08CA3500505_001_001-201808080856ND
2018-08-08CA3500505_002_002-201808080816ND
2018-11-14CA3500505_005_005-201811141030ND
2018-11-14CA3500505_001_001-201811141230ND
2018-11-27CA3500505_002_002-201811271215ND
2019-03-26CA3500505_005_005-201903261100ND
2022-01-28CA3500505_001_001-202201281010ND
2022-03-31CA3500505_005_005-202203311345ND