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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

City of Tempe

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

 

62

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
2014ND260ND
2015N/A00N/A
2016N/A00N/A
2017ND320ND
2018ND20ND
2019ND20ND

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
2014-01-02201401020127SND
2014-01-28201401280517SND
2014-01-28201401280513SND
2014-01-28201401280511SND
2014-01-28201401280471SND
2014-01-29201401290590SND
2014-01-29201401290579SND
2014-01-29201401290576SND
2014-01-29201401290573SND
2014-01-29201401290571SND
2014-03-24201403240026SND
2014-04-28201404290168SND
2014-04-30201404300549SND
2014-07-29201407290362SND
2014-07-29201407290356SND
2014-07-29201407290358SND
2014-07-29201407290360SND
2014-07-29201407290364SND
2014-07-30201407300568SND
2014-07-30201407300566SND
2014-07-30201407300564SND
2014-07-30201407300562SND
2014-07-30201407300560SND
2014-07-30201407300558SND
2014-11-12201411120111SND
2014-11-12201411120110SND
2017-01-03201701030387SND
2017-01-03201701030385SND
2017-01-17201701170373SND
2017-01-17201701170371SND
2017-01-18201701190155SND
2017-01-18201701190150SND
2017-01-18201701190148SND
2017-01-19201701190167SND
2017-01-26201701260263SND
2017-01-26201701260254SND
2017-01-31201702010341SND
2017-01-31201702010339SND
2017-03-23201703230333SND
2017-06-01201706010858SND
2017-06-01201706010849SND
2017-08-28201708280362SND
2017-08-28201708280365SND
2017-08-28201708280402SND
2017-08-28201708280413SND
2017-08-28201708280408SND
2017-08-29201708290330SND
2017-08-29201708290316SND
2017-08-30201708300568SND
2017-09-06201709060759SND
2017-09-06201709060739SND
2017-09-06201709060717SND
2017-09-07201709070469SND
2017-09-07201709070466SND
2017-10-03201710030741SND
2017-10-11201710110933SND
2017-10-11201710110930SND
2017-10-26201710260283SND
2018-02-13201802130408SND
2018-04-10201804100343SND
2019-01-02201901020284SND
2019-07-25201907250154SND