Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Redmond Water Department

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.

 

32

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
2020N/A00N/A
2021ND150ND
2022ND10ND
2023ND160ND

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
2021-05-112132264-SND
2021-05-112132295-SND
2021-05-182133715-SND
2021-05-182133712-SND
2021-05-182133726-SND
2021-06-022137359-SND
2021-06-022137357-SND
2021-06-092132299-SND
2021-08-252161788-SND
2021-08-252161793-SND
2021-08-252161794-SND
2021-08-252161792-SND
2021-08-252161791-SND
2021-08-252161787-SND
2021-08-252161795-SND
2022-08-1022-51468-SND
2023-07-1323-40887-SND
2023-07-1323-40884-SND
2023-07-1323-40882-SND
2023-07-1323-40863-SND
2023-07-1323-40886-SND
2023-07-1323-40885-SND
2023-07-1323-40883-SND
2023-07-1723-41527-SND
2023-10-2323-64753-SND
2023-10-2323-64752-SND
2023-10-2323-64748-SND
2023-10-2323-64754-SND
2023-10-2323-64744-SND
2023-10-2323-64750-SND
2023-10-2323-64743-SND
2023-10-2323-64746-SND