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EWG's Tap Water Database — 2021 UPDATE

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

Kalaheo-Koloa

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.

 

27

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
2015N/A00N/A
2016N/A00N/A
2017ND10ND
2018ND20ND
2019ND240ND

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
2017-05-16ND
2018-01-29201801310036ND
2018-01-29201801000000ND
2019-01-30201901310193ND
2019-03-20201903220416ND
2019-03-20201903220488ND
2019-03-20201903220303ND
2019-03-20201903220415ND
2019-03-20201903220302ND
2019-03-22201903260283ND
2019-03-22201903260247ND
2019-03-22201903260250ND
2019-03-22201903260219ND
2019-03-22201903260218ND
2019-06-18201906200462ND
2019-08-20201908220600ND
2019-08-20201908220601ND
2019-08-20201908220544ND
2019-08-20201908220543ND
2019-08-21201908230494ND
2019-08-21201908230483ND
2019-08-21201908230361ND
2019-08-21201908230362ND
2019-08-21201908230493ND
2019-08-21201908230482ND
2019-08-26201908280583ND
2019-10-15201910170567ND