Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Woodbury

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.

 

59

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND50ND
2020ND210ND
2021ND80ND
2022ND90ND
2023ND130ND

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
2018-05-2318E1991-03ND
2018-08-0918H0772-01ND
2018-08-0918H0772-04ND
2019-06-1119F0679-01ND
2019-09-1019I0448-05ND
2019-11-1419K0582-02ND
2019-11-1419K0582-03ND
2019-11-1419K0582-05ND
2020-01-2120A0772-01ND
2020-06-2220F1764-01ND
2020-06-2220F1764-04ND
2020-06-2220F1764-03ND
2020-06-2220F1764-02ND
2020-08-2520H1964-01ND
2020-08-2520H1978-03ND
2020-08-2520H1978-02ND
2020-08-2520H1978-01ND
2020-08-2520H1971-03ND
2020-08-2520H1971-02ND
2020-08-2520H1971-01ND
2020-08-2520H1964-03ND
2020-08-2520H1963-02ND
2020-08-2520H1963-01ND
2020-11-1220K0577-02ND
2020-11-1220K0578-01ND
2020-11-1220K0578-02ND
2020-11-1220K0578-03ND
2020-12-0320L0163-01ND
2020-12-0320L0163-02ND
2021-03-0921C0453-01ND
2021-03-0921C0455-02ND
2021-03-0921C0455-01ND
2021-04-2721D1533-01ND
2021-04-2721D1533-02ND
2021-04-2721D1533-03ND
2021-04-2721D1533-04ND
2021-07-1521G0885-01ND
2022-05-1922E1661-01ND
2022-05-1922E1661-02ND
2022-09-2122I1869-01ND
2022-09-2122I1869-02ND
2022-09-2122I1869-03ND
2022-09-2122I1869-04ND
2022-09-2122I1870-02ND
2022-12-1522L0868-02ND
2022-12-1522L0868-01ND
2023-03-1323C0640-01ND
2023-06-0723F0522-01ND
2023-09-0723I0263-02ND
2023-09-0723I0263-03ND
2023-09-0723I0264-01ND
2023-09-0723I0264-02ND
2023-09-1923I1033-02ND
2023-09-1923I1033-05ND
2023-12-2023L0783-01ND
2023-12-2023L0783-02ND
2023-12-2023L0783-03ND
2023-12-2023L0783-04ND
2023-12-2023L0783-06ND