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EWG's Tap Water Database — 2019 UPDATE

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

Florin County 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.

 

31

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND50ND
2014ND70ND
2015ND170ND
2016N/A00N/A
2017N/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
2012-05-302155-009-0956ND
2012-08-292155-003-0937ND
2013-12-120013-010-1304ND
2013-12-120013-006-1427ND
2013-12-120013-004-1155ND
2013-12-120013-002-1114ND
2013-12-120013-007-0950ND
2014-04-300013-006-1241ND
2014-04-300013-003-0927ND
2014-04-300013-007-0841ND
2014-04-300013-009-1200ND
2014-04-300013-002-1017ND
2014-04-300013-004-1054ND
2014-08-070013-012-1010ND
2015-02-110013-010-1305ND
2015-02-110013-012-0948ND
2015-02-110013-007-0906ND
2015-02-110013-006-1402ND
2015-02-110013-004-1115ND
2015-02-110013-009-1216ND
2015-05-270013-003-1012ND
2015-05-270013-012-0923ND
2015-05-270013-009-1159ND
2015-05-270013-004-1053ND
2015-05-270013-006-1258ND
2015-09-230013-003-1044ND
2015-09-230013-004-1147ND
2015-09-230013-006-1336ND
2015-09-230013-007-0932ND
2015-09-230013-009-1247ND
2015-09-230013-012-1009ND