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EWG's Tap Water Database — 2019 UPDATE

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2,3,7,8-TCDD (Dioxin)

City of Phoenix

Dioxins are contaminants released from chemical manufacturing, pulp and paper bleaching, and incineration of products that contain chlorine. 2,3,7,8-Tetrachlorodibenzodioxin (2,3,7,8-TCDD) is the most toxic chemical in the group of dioxins. Read More.

Dioxins are among the most toxic known environmental pollutants. As a class, dioxins are extremely toxic, persistent and bioaccumulative; these contaminants build up and are stored in fatty tissues and fluids, such as breast milk, and pass from the mother to the child. Most people are exposed to dioxins through the food they eat, primarily from meat, dairy, fish and eggs. In humans, dioxins are associated with cancer, birth defects, damage to the nervous and immune systems, altered metabolism, thyroid disruption, altered menstrual cycling and damage to the cardiovascular system.

 

83

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND40ND
2013ND80ND
2014ND220ND
2015ND30ND
2016ND20ND
2017ND440ND

ppt = parts per trillion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.0002 ppt

The EWG Health Guideline of 0.0002 ppt for 2,3,7,8-TCDD was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

EPA Maximum Contaminant
Level (MCL) 0.03 ppt

ppt = parts per trillion

All test results

Date Lab ID Result
2012-01-03201201030164SND
2012-01-10201201110321SND
2012-01-25201201250417SND
2012-11-07201211070495SND
2013-02-15201302150475SND
2013-02-15201302150468SND
2013-04-16201304160134SND
2013-04-16201304160124SND
2013-07-17201307170557SND
2013-07-23201307230515SND
2013-10-21201310210140SND
2013-10-24201310240747SND
2014-01-064010287-01SND
2014-01-08201401080631SND
2014-01-15201401170161SND
2014-01-15201401150536SND
2014-01-16201401170152SND
2014-01-16201401160567SND
2014-01-21201401210436SND
2014-01-21201401210418SND
2014-02-18201402180228SND
2014-02-19201402190361SND
2014-02-26201402260761SND
2014-04-07201404080427SND
2014-07-01201407010384SND
2014-07-01201407010324SND
2014-07-02201407020639SND
2014-07-08201407090996SND
2014-07-09201407090989SND
2014-07-15201407150419SND
2014-07-16201407160710SND
2014-07-22201407220311SND
2014-07-23201407230695SND
2014-07-23201407230688SND
2015-02-03201502030362SND
2015-07-08201507090339SND
2015-10-06201510060431SND
2016-01-05201601060236SND
2016-07-05201607050431SND
2017-01-04201701050395SND
2017-01-04201701050474SND
2017-01-04201701050449SND
2017-01-04201701050375SND
2017-01-04201701040662SND
2017-01-05201701050484SND
2017-01-10201701100457SND
2017-01-10201701100449SND
2017-01-11201701120609SND
2017-01-11201701120602SND
2017-01-17201701180220SND
2017-01-17201701180213SND
2017-01-18201701180348SND
2017-01-18201701180236SND
2017-01-25201701250400SND
2017-01-25201701250387SND
2017-02-01201702010373SND
2017-02-08201702080304SND
2017-02-22201702220342SND
2017-03-28201703280847SND
2017-04-27201704270399SND
2017-04-27201704270388SND
2017-07-05201707050526SND
2017-07-1120170711086SND
2017-07-11201707110867SND
2017-07-12201707130582SND
2017-07-12201707130576SND
2017-07-13201707130642SND
2017-07-13201707130606SND
2017-07-13201707130595SND
2017-07-13201707130589SND
2017-07-132017071305599SND
2017-07-18201707190867SND
2017-07-19201707190843SND
2017-07-26201707280153SND
2017-07-27201707280176SND
2017-07-27201707280163SND
2017-08-01201708020914SND
2017-08-01201708020899SND
2017-08-02201708030624SND
2017-08-02201708030618SND
2017-08-03201708030639SND
2017-10-10201710100357SND
2017-10-12201710120503SND