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EWG's Tap Water Database — 2019 UPDATE

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

City of Corona

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.

 

142

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND240ND
2013ND270ND
2014ND250ND
2015ND230ND
2016ND200ND
2017ND230ND

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
2012-06-132155-003-1145ND
2012-06-132155-013-1115ND
2012-06-132155-022-1030ND
2012-06-132155-023-1230ND
2012-06-132155-030-1200ND
2012-06-132155-033-1300ND
2012-06-202155-014-1550ND
2012-06-202155-015-1450ND
2012-06-202155-027-0930ND
2012-06-202155-032-1035ND
2012-06-202155-038-1310ND
2012-06-212155-019-0950ND
2012-06-212155-034-1300ND
2012-06-212155-043-1220ND
2012-06-212155-052-1040ND
2012-06-222155-039-0730ND
2012-06-272155-024-0930ND
2012-06-272155-029-1400ND
2012-06-272155-031-1450ND
2012-06-272155-054-1120ND
2012-06-272155-056-1030ND
2012-06-272155-062-1020ND
2012-09-122155-021-0920ND
2012-12-042155-055-0900ND
2013-02-060013-021-0930ND
2013-02-060013-027-1330ND
2013-02-060013-030-1130ND
2013-02-060013-039-1130ND
2013-02-130013-052-1510ND
2013-02-130013-054-1350ND
2013-02-130013-062-1440ND
2013-05-010013-024-1230ND
2013-05-010013-038-1050ND
2013-05-080013-003-1440ND
2013-05-080013-022-1400ND
2013-05-080013-023-0910ND
2013-05-160013-019-1340ND
2013-05-160013-034-0915ND
2013-05-160013-043-1050ND
2013-06-050013-055-1015ND
2013-06-260013-028-0900ND
2013-08-079590-032-0940ND
2013-08-159590-033-0900ND
2013-08-159590-056-1435ND
2013-08-219590-029-1002ND
2013-08-229590-013-0940ND
2013-08-229590-014-1500ND
2013-08-229590-015-1402ND
2013-08-229590-031-0825ND
2013-09-049590-055-1115ND
2013-12-109590-055-0845ND
2014-02-129590-021-0900ND
2014-02-129590-027-1020ND
2014-02-122116-028-1450ND
2014-02-129590-039-1100ND
2014-02-129590-052-1145ND
2014-02-129590-054-1355ND
2014-02-269590-030-0730ND
2014-03-129590-055-1120ND
2014-05-149590-024-1325ND
2014-05-142116-038-1035ND
2014-05-149590-043-0915ND
2014-05-159590-019-1155ND
2014-05-159590-022-0850ND
2014-05-159590-023-1005ND
2014-05-159590-034-1500ND
2014-08-139590-015-0930ND
2014-08-139590-031-1455ND
2014-08-139590-032-1100ND
2014-08-139590-033-1315ND
2014-08-219590-029-0900ND
2014-08-269590-003-1400ND
2014-08-279590-014-1315ND
2014-08-279590-056-1415ND
2014-08-289590-013-1030ND
2014-09-169590-054-1500ND
2015-02-039590-030-1000ND
2015-02-129590-027-0900ND
2015-02-122116-028-1420ND
2015-02-129590-030-0810ND
2015-02-129590-039-0950ND
2015-02-129590-052-1330ND
2015-05-289590-003-0940ND
2015-05-289590-019-1045ND
2015-05-289590-024-0930ND
2015-05-289590-034-0830ND
2015-05-289590-038-1000ND
2015-05-289590-043-1100ND
2015-06-099590-062-0815ND
2015-08-129590-029-0900ND
2015-08-129590-031-1020ND
2015-08-129590-032-1100ND
2015-08-129590-056-0940ND
2015-08-209590-013-0900ND
2015-08-209590-014-1430ND
2015-08-209590-015-1130ND
2015-08-209590-033-0950ND
2015-10-149590-023-0930ND
2015-10-149590-054-1330ND
2016-04-139590-027-0950ND
2016-04-132116-028-0800ND
2016-04-139590-030-0850ND
2016-04-219590-054-1340ND
2016-04-279590-062-1320ND
2016-07-209590-039-1045ND
2016-08-189590-003-1000ND
2016-08-189590-023-1050ND
2016-08-189590-038-1400ND
2016-08-239590-024-1430ND
2016-08-249590-019-1030ND
2016-08-249590-034-0900ND
2016-08-242116-043-1430ND
2016-10-119590-031-1530ND
2016-10-129590-032-1430ND
2016-10-209590-029-1400ND
2016-10-279590-014-0915ND
2016-10-279590-015-1020ND
2016-10-279590-033-1400ND
2016-10-279590-056-0840ND
2017-04-129590-030-1000ND
2017-04-129590-054-1400ND
2017-04-129590-062-1500ND
2017-04-209590-027-1400ND
2017-04-209590-038-0920ND
2017-04-209590-039-1500ND
2017-08-092155-019-1030ND
2017-08-092155-023-0945ND
2017-08-092155-024-1400ND
2017-08-092155-043-1530ND
2017-08-102155-034-1220ND
2017-08-252116-019-0055ND
2017-08-252116-023-0055ND
2017-08-252116-024-0055ND
2017-08-252116-034-0055ND
2017-08-252116-043-0055ND
2017-10-129590-015-1500ND
2017-10-129590-031-0930ND
2017-10-129590-032-1030ND
2017-10-199590-014-1030ND
2017-10-199590-029-1500ND
2017-10-199590-056-1400ND
2017-10-269590-033-1000ND