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EWG's Tap Water Database — 2021 UPDATE

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

Bella Vista City Water System

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.

 

61

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND310ND
2015N/A00N/A
2016N/A00N/A
2017ND80ND
2018N/A00N/A
2019ND220ND

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
2014-01-142958547ND
2014-01-142958539ND
2014-01-142958505ND
2014-01-142958497ND
2014-01-142958449ND
2014-01-1429584232ND
2014-01-142958302ND
2014-01-142958232ND
2014-01-142958225ND
2014-01-142958200ND
2014-01-152959277ND
2014-01-152959269ND
2014-01-152959491ND
2014-01-152959509ND
2014-01-152959501ND
2014-01-152969261ND
2014-08-133084005ND
2014-08-133084013ND
2014-08-133084022SND
2014-08-133084029ND
2014-08-133084037ND
2014-08-133084047ND
2014-08-143084323ND
2014-08-143084315ND
2014-08-143084307ND
2014-08-143084299ND
2014-08-143084291ND
2014-08-143084283ND
2014-08-143084275ND
2014-08-143084267ND
2014-08-213089438ND
2017-01-0410375191-002ND
2017-01-0410375191-001ND
2017-01-0410375190-002ND
2017-01-0410375190-001ND
2017-07-1810396681-004ND
2017-07-1810396681-003ND
2017-07-1810396681-001ND
2017-08-2810401467-001ND
2019-01-2810463108-004ND
2019-01-2810463108-003ND
2019-01-2810463108-002ND
2019-01-2810463108-001ND
2019-01-3110463536-001ND
2019-01-3110463536-002ND
2019-01-3110463536-003ND
2019-02-0110463276-004ND
2019-02-0110463276-003ND
2019-02-0110463276-002ND
2019-02-0110463276-001ND
2019-04-0310469756-004ND
2019-04-0310469756-003ND
2019-04-0310469756-002ND
2019-04-0310469756-001ND
2019-04-0410470587-001ND
2019-04-0410470587-007ND
2019-04-0410470587-006ND
2019-04-0410470587-005ND
2019-04-0410470587-004ND
2019-04-0410470587-003ND
2019-04-0410470587-002ND