Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

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

California American Water Company - Suburban

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.

 

87

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
2016ND330ND
2017ND30ND
2018ND480ND
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
2016-09-202116-001-0916ND
2016-09-209590-016-1215ND
2016-09-209590-011-1006ND
2016-09-209590-017-1057ND
2016-09-209590-021-1317ND
2016-09-209590-019-1152ND
2016-09-209590-013-1245ND
2016-09-209590-004-0830ND
2016-09-219590-006-1425ND
2016-09-219590-007-1020ND
2016-09-219590-010-1401ND
2016-09-229590-005-1003ND
2016-09-229590-014-0856ND
2016-09-229590-018-0923ND
2016-09-229590-047-1453ND
2016-09-229590-048-1128ND
2016-09-229590-044-1040ND
2016-09-229590-008-1425ND
2016-09-269590-049-1300ND
2016-09-279590-012-1227ND
2016-12-062116-001-1455ND
2016-12-069590-011-1230ND
2016-12-069590-013-1040ND
2016-12-069590-008-1155ND
2016-12-069590-016-0945ND
2016-12-069590-007-0930ND
2016-12-069590-021-1020ND
2016-12-069590-006-1110ND
2016-12-069590-004-1210ND
2016-12-069590-019-1000ND
2016-12-199590-049-1040ND
2016-12-199590-052-1145ND
2016-12-199590-005-1410ND
2017-02-239590-010-1000ND
2017-10-041228-010-1425ND
2017-10-121228-050-1250ND
2018-05-019590-021-1100ND
2018-05-019590-018-0815ND
2018-05-019590-010-1130ND
2018-05-019590-047-0940ND
2018-05-019590-011-0900ND
2018-05-019590-049-1232ND
2018-05-019590-008-1005ND
2018-05-029590-013-1000ND
2018-05-029590-019-1028ND
2018-05-022116-001-0840ND
2018-05-029590-004-1045ND
2018-05-029590-052-1210ND
2018-05-029590-005-0916ND
2018-05-029590-017-1215ND
2018-05-029590-016-0920ND
2018-05-029590-007-1130ND
2018-05-029590-044-1028ND
2018-05-039590-006-1115ND
2018-05-039590-020-1245ND
2018-05-089590-012-1015ND
2018-05-169590-051-1235ND
2018-06-129590-014-0730ND
2018-06-129590-053-0955ND
2018-08-069590-018-0915ND
2018-08-069590-020-1240ND
2018-08-069590-051-1230ND
2018-08-069590-005-0810ND
2018-08-069590-014-1053ND
2018-08-089590-007-0945ND
2018-08-089590-044-1110ND
2018-08-089590-011-1305ND
2018-08-089590-047-1230ND
2018-08-099590-006-1300ND
2018-08-092116-049-1100ND
2018-08-099590-004-0905ND
2018-08-099590-052-1252ND
2018-08-099590-016-0815ND
2018-08-139590-010-1140ND
2018-08-132116-001-0850ND
2018-08-139590-013-1015ND
2018-08-139590-021-1020ND
2018-08-139590-019-1015ND
2018-08-139590-017-0900ND
2018-08-142116-053-0905ND
2018-08-149590-012-1130ND
2018-09-119590-009-0845ND
2018-10-179590-008-1030ND
2018-12-129590-009-0815ND
2019-08-122116-050-1150ND
2019-08-129590-015-0945ND
2019-11-129590-050-1232ND