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EWG's Tap Water Database — 2021 UPDATE

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

Pico Rivera Water Department

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.

 

18

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
2015ND140ND
2016N/A00N/A
2017N/A00N/A
2018ND40ND
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
2015-04-159588-002-0941ND
2015-04-159588-004-1115ND
2015-04-159588-009-1050ND
2015-04-159588-005-1128ND
2015-04-159588-006-0927ND
2015-04-159588-007-1028ND
2015-04-299588-012-0940ND
2015-07-279588-002-0949ND
2015-07-279588-009-1054ND
2015-07-279588-007-1034ND
2015-07-279588-006-0932ND
2015-07-279588-005-1120ND
2015-07-279588-004-1145ND
2015-07-289588-012-1109ND
2018-04-179588-006-0905ND
2018-04-179588-002-0930ND
2018-07-269588-006-0855ND
2018-07-269588-002-0919ND