Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Regional Water Authority

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.

 

78

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND260ND
2020ND40ND
2021ND40ND
2022ND360ND
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
2018-03-05SOCR 200489130ND
2018-03-05SOCR 200489131ND
2018-03-05SOCR 200489152ND
2018-11-29SOCR 200514127ND
2019-03-04SOCR 200523153ND
2019-03-04SOCR 200523178ND
2019-03-04SOCR 200523152ND
2019-03-04SOCR 200523177ND
2019-05-08SOC 200531300ND
2019-05-28SOC 200533720ND
2019-05-28SOC 200533719ND
2019-05-28SOC 200533803ND
2019-05-28SOC 200533804ND
2019-05-28SOC 200533660ND
2019-05-28SOC 200533659ND
2019-05-29SOC 200533881ND
2019-05-29SOC 200533880ND
2019-05-29SOC 200533867ND
2019-05-29SOC 200533868ND
2019-08-26SOC 200546200ND
2019-08-26SOC 200546197ND
2019-08-26SOC 200546198ND
2019-08-27SOC 200546267ND
2019-08-27SOC 200546268ND
2019-08-27SOC 200546302ND
2019-08-27SOC 200546303ND
2019-08-28SOC 200546738ND
2019-08-28SOC 200546737ND
2019-08-28SOC 200546736ND
2019-08-28SOC 200546553ND
2020-03-02SOCR 200567667ND
2020-03-02SOCR 200567641ND
2020-03-02SOCR 200567666ND
2020-03-02SOCR 200567642ND
2021-03-08SOCR 200608803ND
2021-03-08SOCR 200608888ND
2021-03-08SOCR 200608887ND
2021-03-09SOCR 200608923ND
2022-03-07H300153409 300153415ND
2022-03-07H300153416 300153418ND
2022-03-07H300153331 300153333ND
2022-03-07H300153334 300153336ND
2022-07-11S300210822 300210823ND
2022-07-11S300210156 300210157ND
2022-07-11S300210164 300210165ND
2022-07-11S300210651 300210652ND
2022-07-11S300210659 300210660ND
2022-07-12S300211086 300211087ND
2022-07-12S300211068 300211069ND
2022-07-12S300211076 300211077ND
2022-07-13S300212413 300212414ND
2022-07-13S300212421 300212422ND
2022-07-14S300212957 300212958ND
2022-10-17S300258850 300258851ND
2022-10-17300258850 300258851BND
2022-10-17300258858 300258859BND
2022-10-17S300258858 300258859ND
2022-10-18S300258921 300258922ND
2022-10-18300258921 300258922BND
2022-10-18300259350 300259351BND
2022-10-18300259358 300259359BND
2022-10-18S300259350 300259351ND
2022-10-18300258913 300258914BND
2022-10-18S300258913 300258914ND
2022-10-18S300259358 300259359ND
2022-10-19S300260499 300260500ND
2022-10-19S300260507 300260508ND
2022-10-19300260507 300260508BND
2022-10-19300260499 300260500BND
2022-10-19S300259940 300259941ND
2022-10-19300259940 300259941BND
2022-10-19300259930 300259933BND
2022-10-19S300259930 300259933ND
2022-12-06S300281400 300281401ND
2023-04-10H300330392 300330394ND
2023-04-10H300329920 300329922ND
2023-04-10H300330395 300330397ND
2023-04-10H300329917 300329919ND