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EWG's Tap Water Database — 2021 UPDATE

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

Goleta 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.

 

51

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND40ND
2015ND90ND
2016ND100ND
2017ND80ND
2018ND90ND
2019ND110ND

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
2014-03-132116-018-1220ND
2014-12-049590-013-1133ND
2014-12-092116-034-1200ND
2014-12-299590-035-1212ND
2015-02-049590-033-1158ND
2015-03-262116-031-0955ND
2015-04-159590-026-1128ND
2015-08-139590-013-1250ND
2015-10-012116-034-1205ND
2015-10-289590-032-1020ND
2015-11-189590-018-1221ND
2015-11-239590-035-1100ND
2015-12-022116-001-1204ND
2016-03-309590-018-0915ND
2016-05-189590-013-1058ND
2016-06-149590-026-1040ND
2016-07-199590-038-1100ND
2016-08-029590-042-1030ND
2016-08-109590-041-1100ND
2016-08-169590-040-1030ND
2016-10-059590-033-1045ND
2016-10-109590-045-1110ND
2016-11-169590-033-1045ND
2017-04-122116-013-1200ND
2017-05-049590-033-1100ND
2017-08-032116-042-1100ND
2017-11-079590-035-1030ND
2017-11-072116-038-1030ND
2017-11-209590-041-1000ND
2017-11-279590-058-1100ND
2017-11-289590-059-1030ND
2018-03-069590-032-1045ND
2018-03-072116-034-1030ND
2018-03-152116-031-1030ND
2018-03-202116-035-1030ND
2018-03-272116-001-1038ND
2018-04-119590-018-1030ND
2018-05-149590-033-1045ND
2018-05-152116-026-1045ND
2018-08-159590-013-1100ND
2019-04-249590-042-1100ND
2019-04-259588-041-1030ND
2019-05-029588-038-1030ND
2019-05-099588-040-1030ND
2019-05-149588-058-1030ND
2019-05-219588-058-1030ND
2019-08-279588-018-1020ND
2019-09-179588-033-1015ND
2019-10-109588-013-1125ND
2019-11-139588-026-1123ND
2019-11-149588-059-1015ND