Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Crystal Farms Water Supply Corporation

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND20ND
2020ND40ND
2021ND10ND
2022ND10ND
2023ND20ND

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
2018-06-20Q1824485008ND
2019-07-25Q1947858006ND
2019-10-31Q1974664011ND
2020-03-12Q2010438009ND
2020-03-12Q2010438010ND
2020-05-21Q2020365007ND
2020-08-31Q2034597001ND
2021-05-20Q2113262008ND
2022-02-22Q2206222009ND
2023-09-07Q2338597001ND
2023-09-07Q2338597009ND