Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Quincy Water Department 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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND50ND
2020N/A00N/A
2021ND40ND
2022ND40ND
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
2018-05-09ND
2018-05-09ND
2018-05-21ND
2018-05-21ND
2019-05-21ND
2019-05-21ND
2019-05-21ND
2019-05-21ND
2019-06-17ND
2021-03-044089331ND
2021-07-094144644ND
2021-07-094144641ND
2021-07-094144645ND
2022-08-164338186ND
2022-08-164338184ND
2022-08-244344917ND
2022-08-244344920ND
2023-03-094509785ND
2023-03-094424687ND
2023-03-094424686ND
2023-03-094424685ND