Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

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

City of Surprise - Mountain Vista

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.

 

93

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND160ND
2013ND160ND
2014ND160ND
2015ND120ND
2016ND170ND
2017ND160ND

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
2012-01-262012012-04SND
2012-01-262012012-03SND
2012-01-262012012-02SND
2012-01-262012012-01SND
2012-04-252042001-01SND
2012-04-252042000-01SND
2012-04-252041999-01SND
2012-04-252041994-01SND
2012-08-152081291-01SND
2012-08-152081287-01SND
2012-08-162081359-01SND
2012-09-042090143-01SND
2012-11-142111028-01SND
2012-11-142111027-01SND
2012-11-142111026-01SND
2012-11-142111024-01SND
2013-01-233011767-04ND
2013-01-233011767-03ND
2013-01-233011767-02ND
2013-01-233011767-01ND
2013-04-243041986-01SND
2013-04-243041985-01SND
2013-04-243041987-01SND
2013-04-243041989-01SND
2013-07-163071369-01SND
2013-07-163071367-01SND
2013-07-163071366-01SND
2013-07-163071362-01SND
2013-10-173101633-01ND
2013-10-173101632-01ND
2013-10-173101631-01ND
2013-10-173101630-01ND
2014-01-224011817-04SND
2014-01-224011817-01SND
2014-01-224011817-02SND
2014-01-224011817-03SND
2014-04-224041931-01ND
2014-04-224041930-01ND
2014-04-224041927-01ND
2014-04-234041928-01ND
2014-07-304072667-01SND
2014-07-304072665-01SND
2014-07-304072658-01SND
2014-07-304072656-01SND
2014-10-284102393-01SND
2014-10-284102394-01SND
2014-10-284102387-01ND
2014-10-294102491-01SND
2015-01-215011694-04ND
2015-04-205041746-01SND
2015-04-205041743-01SND
2015-04-205041742-01ND
2015-04-205041741-01ND
2015-07-285072565-01SND
2015-07-285072564-01SND
2015-07-295072682-01SND
2015-07-295072676-01SND
2015-10-125101373-01ND
2015-10-125101369-01ND
2015-10-125101379-01SND
2016-01-256012035-04TND
2016-01-256012035-03TND
2016-01-256012035-03SND
2016-01-256012035-02TND
2016-01-256012035-01TND
2016-04-266042227-01SND
2016-04-266042226-01SND
2016-04-266042223-01SND
2016-04-266042222-01SND
2016-07-266072329-01SND
2016-07-266072321-01SND
2016-07-266072323-01SND
2016-07-266072325-01SND
2016-10-246102137-01SND
2016-10-246102135-01SOCND
2016-10-246102133-01SND
2016-10-246102131-01SND
2017-01-307012591-01SND
2017-01-307012591-02SND
2017-01-307012591-03SND
2017-01-307012591-04SND
2017-04-207041996-01SOCND
2017-04-207041995-01SOCND
2017-04-207041987-01SOCND
2017-04-247042213-01SOCND
2017-07-197071806-01SOCND
2017-07-197071805-01SOCND
2017-07-197071804-01SOCND
2017-07-197071802-01SOCND
2017-10-117101207-02SOCND
2017-10-117101207-03SOCND
2017-10-117101207-04SOCND
2017-10-117101207-01SOCND