Know Your Environment. Protect Your Health.

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

Ward II Water District

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
2018N/A00N/A
2019ND20ND
2020ND20ND
2021ND140ND
2022ND10ND
2023ND50ND

ppt = parts per trillion

State, National, and Health Guidelines for Drinking Water

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
2019-07-2410485306002ND
2019-07-2410485306002ND
2020-06-2310523037001ND
2020-06-2310523037002ND
2021-03-2910554118003ND
2021-03-2910554118002ND
2021-03-2910554118001ND
2021-06-1410566244003ND
2021-06-1410566244005ND
2021-06-1410566244004ND
2021-06-1410566244002ND
2021-06-1410566244001ND
2021-06-2810568457003ND
2021-06-2810568457002ND
2021-06-2810568457001ND
2021-06-2810568454003ND
2021-06-2810568454002ND
2021-06-2810568454001ND
2022-08-2210623565004ND
2023-05-0810653113001ND
2023-05-0810653113002ND
2023-05-0810653113003ND
2023-05-0810653113004ND
2023-05-0810653113005ND