Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

City of Rexburg

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019N/A00N/A
2020ND40ND
2021ND60ND
2022N/A00N/A
2023ND80ND

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
2018-06-29SB18070177001ND
2018-06-29SB18070188001ND
2018-08-01S1813271ND
2020-06-29SB20070003001ND
2020-07-06SB20070490001ND
2020-11-30SB20120066001ND
2020-11-30SB20120071001ND
2021-01-25SB21011645001ND
2021-01-25SB21011641001ND
2021-03-31SB21040230001ND
2021-04-01SB21040627001ND
2021-04-26SB21041931001ND
2021-04-26SB21041974001ND
2023-06-14SMDF068704ND
2023-06-14SMDF068705ND
2023-06-14SMDF068706ND
2023-06-14SMDF068707ND
2023-09-11SMDI035501ND
2023-09-11SMDI035601ND
2023-09-11SMDI035801ND
2023-09-11SMDI035901ND