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EWG's Tap Water Database — 2021 UPDATE

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

California American Water Company - Antelope

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.

 

49

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
2014N/A00N/A
2015N/A00N/A
2016ND130ND
2017ND10ND
2018ND330ND
2019ND20ND

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
2016-09-219590-001-1050ND
2016-09-219590-016-0915ND
2016-09-219590-017-1303ND
2016-09-219590-011-0810ND
2016-09-219590-008-1120ND
2016-09-219590-007-1200ND
2016-09-219590-002-1343ND
2016-09-229590-004-1042ND
2016-09-229590-018-0831ND
2016-09-229590-014-1139ND
2016-09-229590-013-0954ND
2016-12-199590-008-1316ND
2016-12-199590-005-1557ND
2017-12-292116-003-1150ND
2018-01-109590-006-0805ND
2018-05-019590-009-1130ND
2018-05-019590-002-0945ND
2018-05-019590-017-1045ND
2018-05-019590-006-1320ND
2018-05-012116-004-1220ND
2018-05-019590-016-0845ND
2018-05-029590-011-0845ND
2018-05-029590-012-1010ND
2018-05-029590-010-0815ND
2018-05-029590-003-1135ND
2018-05-029590-008-1105ND
2018-05-029590-018-0900ND
2018-05-039590-013-1120ND
2018-05-039590-014-1030ND
2018-06-132116-005-0810ND
2018-08-079590-009-0900ND
2018-08-079590-010-1310ND
2018-08-072116-011-1120ND
2018-08-072116-012-1030ND
2018-08-072116-018-1210ND
2018-08-089590-002-0920ND
2018-08-089590-017-1010ND
2018-08-089590-016-1340ND
2018-08-099590-008-1020ND
2018-08-092116-007-1130ND
2018-08-149590-040-1040ND
2018-08-142116-013-1220ND
2018-08-149590-006-1000ND
2018-08-142116-004-0830ND
2018-08-142116-003-1130ND
2018-08-152116-014-1045ND
2018-11-072116-007-1115ND
2019-05-169590-001-1020ND
2019-08-079590-001-1140ND