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EWG's Tap Water Database — 2019 UPDATE

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

North Penn 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.

 

56

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND240ND
2015ND20ND
2016ND20ND
2017ND280ND

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
2014-04-2214040589-01ND
2014-04-2214040590-01ND
2014-04-2214030715-01ND
2014-04-2214030714-01ND
2014-04-2214030712-01ND
2014-04-2814040582-01ND
2014-04-2914040579-01ND
2014-04-2914030720-01ND
2014-04-2914030719-01ND
2014-04-2914030716-01ND
2014-04-2914030718-01ND
2014-05-1914041348-01ND
2014-07-077535861ND
2014-07-077538118ND
2014-07-077538117ND
2014-07-077538116ND
2014-07-077535860ND
2014-07-217552135ND
2014-07-217552138ND
2014-08-047563591ND
2014-08-2514082298-01ND
2014-08-2514082297-01ND
2014-08-2514082296-01ND
2014-08-2514082295-01ND
2015-07-0213013257ND
2015-12-0913633937ND
2016-08-2314907925ND
2016-11-0215226752ND
2017-01-1115517897ND
2017-04-0515936924ND
2017-04-0515936925ND
2017-04-0515936921ND
2017-04-0515936926ND
2017-04-0515936920ND
2017-04-0515936922ND
2017-04-0515936923ND
2017-04-1916094564ND
2017-04-1915937837ND
2017-04-1915937834ND
2017-04-1915938054ND
2017-04-1915937835ND
2017-04-1915937836ND
2017-07-1216413867ND
2017-07-1216413869ND
2017-07-1216413868ND
2017-07-1216414335ND
2017-07-1216413865ND
2017-07-1216413866ND
2017-07-1216414334ND
2017-07-1716414337ND
2017-07-1716414339ND
2017-07-1716414340ND
2017-07-1716414336ND
2017-07-1716414341ND
2017-07-1716414338ND
2017-10-0916880192ND