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EWG's Tap Water Database — 2021 UPDATE

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

Eastern Municipal Water District

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.

 

21

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
2014ND30ND
2015ND60ND
2016ND30ND
2017ND30ND
2018ND30ND
2019ND30ND

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
2014-08-180013-081-0850ND
2014-08-180013-071-0900ND
2014-08-180013-063-0840ND
2015-04-160013-081-1100ND
2015-04-200013-063-0825ND
2015-04-200013-071-0853ND
2015-08-040013-063-1015ND
2015-08-040013-081-0820ND
2015-08-040013-071-0830ND
2016-08-010013-071-0835ND
2016-08-010013-081-0830ND
2016-08-020013-063-0840ND
2017-08-010013-081-1126ND
2017-08-010013-063-1030ND
2017-08-020013-071-0815ND
2018-07-020013-071-0645ND
2018-07-020013-081-0814ND
2018-07-020013-063-0856ND
2019-07-080013-071-0940ND
2019-07-080013-063-1515ND
2019-07-110013-081-1418ND