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EWG's Tap Water Database — 2021 UPDATE

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

City of Scottsdale

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.

 

44

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND210ND
2015ND30ND
2016N/A00N/A
2017ND200ND
2018N/A00N/A
2019N/A00N/A

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
2014-02-054020547-04SND
2014-02-054020547-03SND
2014-02-054020547-02SND
2014-02-054020547-01ND
2014-02-114020994-01ND
2014-02-124020997-01SND
2014-02-134021207-02SND
2014-02-134021207-01SND
2014-03-134031189-01SND
2014-06-034060399-01ND
2014-08-054080531-01ND
2014-08-054080527-01ND
2014-08-054080529-01ND
2014-08-074080785-03ND
2014-08-074080785-02ND
2014-08-074080785-01ND
2014-08-144081396-01ND
2014-08-214081971-01ND
2014-10-084100949-01ND
2014-11-044110228-01ND
2014-11-10201411100040SND
2015-01-265012122-01ND
2015-06-15201506150242SND
2015-07-28201507290355SND
2017-01-23201701230480SND
2017-01-31201701310419SND
2017-01-31201701310415SND
2017-03-13201703130443SND
2017-04-11201704121085SND
2017-04-18201704180733SND
2017-05-03201705030393SND
2017-05-03201705030386SND
2017-05-11201705110565SND
2017-05-25201705250273SND
2017-08-09201708090677SND
2017-10-02201710020518SND
2017-10-10201710100211SND
2017-10-10201710100207SND
2017-10-23201710230327SND
2017-10-31201711010965SND
2017-10-31201711010947SND
2017-11-01201711010961SND
2017-11-01201711010957SND
2017-11-09201711090343SND