Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Georgetown, City of

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
2018ND10ND
2019ND20ND
2020ND30ND
2021ND30ND
2022ND20ND
2023ND40ND

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
2018-02-07AE07315ND
2019-01-09AE23823ND
2019-06-17AE32048ND
2020-01-15AE42955ND
2020-01-15AE42971ND
2020-01-22AE43349ND
2021-02-03AE60545ND
2021-08-23AE70797ND
2021-11-08AE74672ND
2022-02-01AE78290ND
2022-04-11AE81916ND
2023-02-06AE96469ND
2023-05-17AF02125ND
2023-09-13AF08506ND
2023-11-07AF11145ND