Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Altoona Water Authority

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.

 

22

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
2020ND120ND
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
2020-05-1822286944.00ND
2020-05-1822286917.00ND
2020-05-1822286971.00ND
2020-05-2122483946.00ND
2020-05-2122484000.00ND
2020-05-2122483972.00ND
2020-07-1522676327.00ND
2020-07-1522676354.00ND
2020-07-1522676160.00ND
2020-07-1622869601.00ND
2020-07-1622676408.00ND
2020-07-1622676381.00ND
2023-04-2728974661.00ND
2023-04-2728974641.00ND
2023-05-0328974790.00ND
2023-05-0328974757.00ND
2023-05-0428974702.00ND
2023-08-0229372122.00ND
2023-08-0229372128.00ND
2023-08-0329571040.00ND
2023-08-0329571046.00ND
2023-08-1029571099.00ND