Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Manchester 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.

 

37

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019ND110ND
2020ND10ND
2021ND10ND
2022ND150ND
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
2018-02-23AA82899-SOCRND
2018-06-13AA84269-SOC2ND
2018-06-13AA84270-SOC2ND
2018-06-26AA84433-SOC2ND
2018-06-27AA84458-SOC2ND
2018-06-27AA84459-SOC2ND
2018-06-29AA84479-SOC2ND
2018-06-29AA84480-SOC2ND
2019-05-03AA88240-SOCRND
2019-09-16AA90007-SOC2ND
2019-09-16AA89985-SOC2ND
2019-09-16AA89986-SOC2ND
2019-09-16AA89986-SOC2ND
2019-09-16AA90001-SOC2ND
2019-09-16AA90001-SOC2ND
2019-09-16AA89989-SOC2ND
2019-09-17AA89998-SOC2ND
2019-09-17AA90002-SOC2ND
2019-09-17AA89998-SOC2ND
2020-10-01AA94988-SOCRND
2021-11-04211104-1-04RSOCND
2022-06-03220603-1-04 RSOCND
2022-06-06220606-1-06 SOCND
2022-06-06220606-3-01SOCND
2022-06-06220606-3-02 SOCND
2022-06-06220606-3-03 SOCND
2022-06-07220607-3-04SOCND
2022-06-08220608-3-05 SOCND
2022-06-08220608-3-06 SOCND
2022-09-01220901-3-08SOCND
2022-09-01220901-3-09SOCND
2022-09-01220901-3-06SOCND
2022-09-07220907-1-10SOCND
2022-09-07220907-3-05 SOCND
2022-09-07220907-3-06SOCND
2022-10-12221012-3-04 SOCND
2023-12-05231205-1-04 RTPND