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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Clifton Park 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.

MORE ABOUT THIS CONTAMINANT

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND20ND
2015ND20ND
2016ND80ND
2017ND60ND
2018ND50ND
2019ND30ND

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-06-17142902-5917-SOCSND
2014-06-17142902-5911-SOCSND
2015-06-09C007898-01-SOCSND
2015-06-09C007904-01-SOCSND
2016-06-08160608088-SOCSND
2016-06-08160608094-001-SOND
2016-06-08160608095-001-SOND
2016-06-08160608092-001-POND
2016-06-08160808089-001-SOND
2016-06-08160608090-SOCSND
2016-09-07160907025-SOCSND
2016-09-07160907025-002-SOND
2017-06-27170627043-SOCSND
2017-06-27170627043-SOCSND
2017-06-27170627043-03-SOCND
2017-06-27170627043-02-SOCND
2017-06-27170627043-001-SOND
2017-09-06170907003-001-SOND
2018-06-18C036393-02-SOCSND
2018-06-18C036388-03-SOCSND
2018-06-18C036393-01-SOCSND
2018-06-18C036388-01-SOCSND
2018-06-18C036388-02-SOCSND
2019-06-13C045533-02-SOCSND
2019-06-13C045533-03-SOCSND
2019-06-13C045533-01-SOCSND