Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

City of Idaho Falls

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
2018ND20ND
2019ND20ND
2020ND10ND
2021ND80ND
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
2018-09-18SB18091727001ND
2018-10-10SB18101095001ND
2019-03-25SB19032049001ND
2019-04-16SB19041514001ND
2020-07-08SB20070749001ND
2021-06-22SB21062273001ND
2021-06-22SB21062273002ND
2021-06-23SB21062273004ND
2021-06-23SB21062273003ND
2021-07-26SB21072236002ND
2021-07-26SB21072236003ND
2021-07-26SB21072236004ND
2021-07-26SB21072236001ND
2022-06-21SB22062040001ND
2022-06-21SB22062040002ND