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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 - Lincoln Oaks

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.

 

64

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014N/A00N/A
2015N/A00N/A
2016ND180ND
2017ND10ND
2018ND450ND
2019N/A00N/A

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
2016-09-219590-015-1000ND
2016-09-219590-025-1230ND
2016-09-219590-026-0910ND
2016-09-219590-028-1310ND
2016-09-219590-002-1110ND
2016-12-069590-016-1443ND
2016-12-069590-024-1046ND
2016-12-069590-013-1410ND
2016-12-069590-012-0956ND
2016-12-069590-004-1340ND
2016-12-069590-014-0926ND
2016-12-069590-023-1325ND
2016-12-062116-010-1530ND
2016-12-069590-006-1122ND
2016-12-069590-021-0809ND
2016-12-069590-009-1300ND
2016-12-079590-008-1113ND
2016-12-152116-007-1009ND
2017-10-191228-019-1035ND
2018-01-242116-003-0940ND
2018-02-269590-001-1405ND
2018-03-229590-022-1050ND
2018-05-012116-003-1010ND
2018-05-019590-016-0835ND
2018-05-019590-014-1155ND
2018-05-012116-013-1345ND
2018-05-019590-004-1215ND
2018-05-019590-005-1105ND
2018-05-019590-006-1125ND
2018-05-019590-009-1300ND
2018-05-022116-010-0945ND
2018-05-029590-012-1215ND
2018-05-029590-019-1020ND
2018-05-029590-025-0930ND
2018-05-029590-015-1100ND
2018-05-029590-021-0840ND
2018-05-039590-026-0920ND
2018-05-039590-002-1320ND
2018-05-039590-024-1255ND
2018-05-319590-022-0845ND
2018-06-139590-001-1305ND
2018-06-132116-028-1200ND
2018-08-069590-015-0835ND
2018-08-069590-019-1140ND
2018-08-069590-026-0910ND
2018-08-079590-009-1215ND
2018-08-072116-005-0840ND
2018-08-079590-004-1310ND
2018-08-079590-023-1055ND
2018-08-079590-024-0952ND
2018-08-089590-014-1140ND
2018-08-089590-021-1010ND
2018-08-089590-006-1250ND
2018-08-139590-025-1200ND
2018-08-139590-028-1220ND
2018-08-139590-016-1200ND
2018-08-139590-013-0955ND
2018-08-132116-012-0840ND
2018-08-139590-002-0840ND
2018-08-132116-001-1035ND
2018-08-152116-010-0840ND
2018-08-162116-008-1045ND
2018-08-162116-003-0820ND
2018-11-132116-008-0815ND