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EWG's Tap Water Database — 2021 UPDATE

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

City of Tempe

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.

 

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
2014ND250ND
2015ND10ND
2016N/A00N/A
2017ND320ND
2018ND20ND
2019ND20ND

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
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
2014-04-28201404290168SND
2014-04-30201404300549SND
2014-07-29201407290360SND
2014-07-29201407290356SND
2014-07-29201407290358SND
2014-07-29201407290362SND
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
2015-03-04201503050179SND
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
2018-03-01201803010363SND
2018-04-10201804100343SND
2019-01-02201901020284SND
2019-07-25201907250154SND