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EWG's Tap Water Database — 2021 UPDATE

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1,4-Dioxane

Bertie County Regional Water

1,4-Dioxane is a solvent classified by the EPA as a likely human carcinogen. It contaminates groundwater in many states due to industrial wastewater discharges, plastic manufacturing runoff and landfill runoff. Read More.

Animal studies show that 1,4-dioxane can target the liver, kidneys and respiratory system, and that prenatal exposure can harm the developing fetus. The State of California has set a Public Heatlh Goal of no more than 1 part per billion of 1,4-dioxane in drinking water. The state of Massachusetts sets a legal limit of 0.3 ppb, and New Hampshire's limit is 3 parts per billion. There is no national drinking water standard for this contaminant.

Click here to read more about 1,4-dioxane.

MORE ABOUT THIS CONTAMINANT

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

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

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.35 ppb

The EWG Health Guideline of 0.35 ppb for 1,4-dioxane 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.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-112990322ND
2014-03-112990279ND
2014-03-172993712ND
2014-03-172993459ND
2014-03-172993513ND
2014-03-182993838ND
2014-03-182993782ND
2014-03-182993437ND
2014-03-192994692ND
2014-03-192994638ND
2014-03-192994864ND
2014-09-173106727ND
2014-09-173106678ND
2014-09-173106400ND
2014-09-183107509ND
2014-09-183107486ND
2014-09-183107744ND
2014-09-183107787ND
2014-09-183107908ND
2014-09-183107528ND
2014-09-183107537ND
2014-09-183107547ND