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EWG's Tap Water Database — 2021 UPDATE

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

City of Brentwood

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.

 

41

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND80ND
2015ND80ND
2016ND70ND
2017ND60ND
2018ND60ND
2019ND60ND

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
2014-06-179590-008-1000ND
2014-06-179590-007-1045ND
2014-06-199590-024-0710ND
2014-06-199590-014-0945ND
2014-06-199590-006-1010ND
2014-06-199590-012-0810ND
2014-06-199590-011-0845ND
2014-06-309590-026-0750ND
2015-04-149590-006-1020ND
2015-04-149590-014-1000ND
2015-04-149590-008-0920ND
2015-04-149590-007-1000ND
2015-04-159590-026-1005ND
2015-04-159590-024-0942ND
2015-04-159590-011-0901ND
2015-04-159590-012-0917ND
2016-05-319590-006-0830ND
2016-05-319590-007-0945ND
2016-05-319590-008-0900ND
2016-06-019590-011-0800ND
2016-06-019590-026-0945ND
2016-06-019590-024-0900ND
2016-10-052116-014-1135ND
2017-08-169590-012-1000ND
2017-08-249590-006-0830ND
2017-08-249590-007-0743ND
2017-09-079590-014-0750ND
2017-09-079590-008-0828ND
2017-09-079590-026-0900ND
2018-05-079590-006-0805ND
2018-05-079590-007-0850ND
2018-05-099590-008-0830ND
2018-05-099590-012-0746ND
2018-05-109590-026-0850ND
2018-05-109590-014-0740ND
2019-05-069590-008-0855ND
2019-05-069590-007-0940ND
2019-05-069590-006-1010ND
2019-05-099590-026-1010ND
2019-05-099590-012-0910ND
2019-05-099590-014-0810ND