Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Purcellville, Town of

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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND50ND
2019ND20ND
2020N/A00N/A
2021ND40ND
2022N/A00N/A
2023ND40ND

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
2018-03-13E180100344ND
2018-05-23E180303866ND
2018-05-30E180303847ND
2018-08-21E180601978ND
2018-08-28E180601963ND
2019-03-21E190302944ND
2019-03-21E190302955ND
2021-02-24E210100124ND
2021-05-17E210400627ND
2021-05-24E210400641ND
2021-08-18E210601483ND
2023-01-25E221203942ND
2023-05-31E230305396ND
2023-05-31E230305419ND
2023-08-22E230603361ND