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EWG's Tap Water Database — 2021 UPDATE

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

East Hempfield Water Authority

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.

 

36

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND240ND
2015N/A00N/A
2016N/A00N/A
2017ND120ND
2018N/A00N/A
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
2014-03-1814030671-06ND
2014-03-1814030671-01ND
2014-03-1814030671-02ND
2014-03-1814030671-05ND
2014-03-1814030671-03ND
2014-03-1814030671-04ND
2014-05-2114030670-01ND
2014-05-2114030695-01ND
2014-05-2114030680-01ND
2014-05-2114030693-01ND
2014-05-2114030683-01ND
2014-05-2114030690-01ND
2014-08-2014030672-01ND
2014-08-2014030696-01ND
2014-08-2014030694-01ND
2014-08-2014030684-01ND
2014-08-2014030681-01ND
2014-08-2014030692-01ND
2014-11-1814030678-05ND
2014-11-1814030678-04ND
2014-11-1814030678-03ND
2014-11-1814030678-06ND
2014-11-1814030678-02ND
2014-11-1814030678-01ND
2017-04-1716218415ND
2017-04-1716218385ND
2017-04-1716218355ND
2017-04-1716218325ND
2017-06-1216378300ND
2017-06-1216378270ND
2017-08-2516844295ND
2017-08-2516844273ND
2017-08-2516844317ND
2017-08-2516844339ND
2017-08-2516844361ND
2017-08-2516844251ND