Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Lehigh County Authority Allentown Division

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020ND80ND
2021N/A00N/A
2022N/A00N/A
2023ND100ND

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
2020-04-0822077912.00ND
2020-04-1422077868.00ND
2020-04-1422077832.00ND
2020-04-2222078446.00ND
2020-07-0822660552.00ND
2020-07-1622660592.00ND
2020-07-2222660666.00ND
2020-07-2222660628.00ND
2023-04-1128759110.00ND
2023-04-1128759111.00ND
2023-04-1928759271.00ND
2023-04-2628958460.00ND
2023-04-2628958459.00ND
2023-07-1129355976.00ND
2023-07-1129355975.00ND
2023-07-1829355913.00ND
2023-07-1829355914.00ND
2023-07-2529554468.00ND