Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Wallingford 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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019ND60ND
2020ND30ND
2021ND10ND
2022ND50ND
2023ND10ND

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
2018-06-28CA80406ND
2019-08-05CD73202-P2ND
2019-08-05CD73200ND
2019-08-12CD83465-P2ND
2019-09-16CE10614-P2ND
2019-10-10CE30938-P2ND
2019-11-04CE53371-P2ND
2020-06-08CG08411-P2ND
2020-08-12CG53026ND
2020-09-08CG72643AND
2021-08-04CI88199ND
2022-04-04CK99720-SOC2ND
2022-04-06CL02035-SOC2ND
2022-07-11CL74320ND
2022-08-10CM01617-P2ND
2022-09-06CM23340-P2ND
2023-07-12CO49574ND