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EWG's Tap Water Database — 2019 UPDATE

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1,4-Dioxane

Moore

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.

 

43

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
2013ND200ND
2014ND200ND
2015ND30ND
2016N/A00N/A
2017N/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
2013-10-093J10006-46AND
2013-10-093J10006-49AND
2013-10-093J10006-58AND
2013-10-093J10006-55AND
2013-10-093J10006-40AND
2013-10-093J10006-43AND
2013-10-093J10006-52AND
2013-10-093J10006-37AND
2013-10-093J10006-19AND
2013-10-093J10006-22AND
2013-10-093J10006-25AND
2013-10-093J10006-13AND
2013-10-093J10006-16AND
2013-10-093J10006-34AND
2013-10-093J10006-04AND
2013-10-093J10006-01AND
2013-10-093J10006-28AND
2013-10-093J10006-10AND
2013-10-093J10006-31AND
2013-10-093J10006-07AND
2014-04-074D08021-01ND
2014-04-074D08021-04ND
2014-04-084D09016-07ND
2014-04-084D09016-04ND
2014-04-084D09016-01ND
2014-04-094D10050-01ND
2014-04-094D10050-19ND
2014-04-094D10050-43ND
2014-04-094D10050-22ND
2014-04-094D10050-07ND
2014-04-094D10050-04ND
2014-04-094D10050-31ND
2014-04-094D10050-16ND
2014-04-094D10050-37ND
2014-04-094D10050-40ND
2014-04-094D10050-34ND
2014-04-094D10050-28ND
2014-04-094D10050-10ND
2014-04-094D10050-13ND
2014-04-094D10050-25ND
2015-12-075L08160-04ND
2015-12-075L08160-07ND
2015-12-075L08160-01ND