Know Your Environment. Protect Your Health.

2,4,5-TP (Silvex)

Metropolitan District Commission

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.

 

43

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND110ND
2019ND40ND
2020ND70ND
2021ND70ND
2022ND70ND
2023ND70ND

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
2018-06-27CA79476ND
2018-06-27CA79475ND
2018-06-27CA79477ND
2018-07-18SOCR 200500124ND
2018-07-18SOCR 200500122ND
2018-07-18SOCR 200500126ND
2018-07-18SOCR 200500125ND
2018-09-25CB38504ND
2018-09-25CB38505RND
2018-09-25CB38869ND
2018-09-25CB38505ND
2019-07-08SOCR 200539198ND
2019-07-08SOCR 200539200ND
2019-07-08SOCR 200539199ND
2019-07-08SOCR 200539197ND
2020-12-08SOC 200600638ND
2020-12-08SOC 200600609ND
2020-12-08SOCR 200600618ND
2020-12-08SOCR 200600626ND
2020-12-08SOCR 200600627ND
2020-12-08SOCR 200600628ND
2020-12-09SOC 200600592ND
2021-11-23S300107593 300107595ND
2021-11-23H300107603 300107604ND
2021-11-23S300107511 300107512ND
2021-11-29S300109627 300109628ND
2021-11-29H300109590 300109592ND
2021-11-30H300109617 300109620ND
2021-11-30H300109618 300109622ND
2022-12-08H300283837 300283839ND
2022-12-08300283822 300283832CND
2022-12-15S300287062 300287064ND
2022-12-15H300287081 300287083ND
2022-12-15H300287109 300287117ND
2022-12-15S300287090 300287092ND
2022-12-15S300287039 300287043ND
2023-12-05S300456329 300456331ND
2023-12-05H300456519 300456521ND
2023-12-05H300456542 300456544ND
2023-12-05H300456513 300456515ND
2023-12-06S300456308 300456310ND
2023-12-06S300456298 300456300ND
2023-12-06H300456516 300456518ND