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EWG's Tap Water Database — 2021 UPDATE

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

Cottonwood Municipal Water Cw1

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.

 

24

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
2014ND20ND
2015ND80ND
2016ND20ND
2017ND40ND
2018ND80ND
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
2014-12-08201412090201SBND
2014-12-08201412090201SAND
2015-02-24201502240234SBND
2015-02-24201502240234SAND
2015-06-03201506040078SCND
2015-06-03201506040078SBND
2015-06-03201506040078SAND
2015-08-26201508270023SCND
2015-08-26201508270023SBND
2015-08-26201508270023SAND
2016-04-06201604070132SND
2016-09-21201609220072SND
2017-03-14201703150222SND
2017-05-23201705240226SND
2017-08-08201708090341SND
2017-11-20201711210054SND
2018-05-16201805170472SDND
2018-05-16201805170472SCND
2018-05-16201805170472SBND
2018-05-16201805170472SAND
2018-10-25201810260040SAND
2018-10-25201810260040SDND
2018-10-25201810260040SCND
2018-10-25201810260040SBND