Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Westchester County Water District #3

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND10ND
2020ND10ND
2021ND20ND
2022ND20ND
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
2018-09-24AU20759SOCSND
2019-11-12AV23848SOCSND
2020-11-09AW21633-1SOCSND
2021-09-20AX19184-SOCS-WD3ND
2021-09-20AX19180-SOCS-WD3ND
2022-10-24AY19127-SOCS-WD3ND
2022-10-24AY19125-SOCS-WD3ND
2023-10-19AZ19385-SOCS-WD3ND
2023-10-19AZ19384-SOCS-WD3ND