Menu

EWG's Tap Water Database

Donate

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

Owensboro Municipal Utilities

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2010N/A00N/A
2011ND40ND
2012N/A00N/A
2013N/A00N/A
2014ND40ND
2015N/A00N/A

ppt = parts per trillion.

State and national drinking water standards and health guidelines

Health Guideline 0.0002 ppt

The 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.

ppt = parts per trillion.

EPA Maximum Contaminant
Level (MCL) 0.03 ppt

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppt = parts per trillion.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppt

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppt = parts per trillion.

All test results

Date Lab ID Result
2011-06-142466451ND
2011-06-142466459ND
2011-09-132516790ND
2011-09-132516798ND
2014-05-073024010ND
2014-05-073024020ND
2014-09-103102490ND
2014-09-103102501ND