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EWG's Tap Water Database

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1,4-Dioxane

Bath County Water District

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.

 

12

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
2011N/A00N/A
2012N/A00N/A
2013N/A00N/A
2014N/A00N/A
2015ND120ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.35 ppb

The 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
2015-01-08M15-10568-01ND
2015-01-08M15-10565-01ND
2015-01-08M15-10564-01ND
2015-04-13M15-14718-02ND
2015-04-13M15-14718-03ND
2015-04-13M15-14718-01ND
2015-07-21M15-20349-03ND
2015-07-21M15-20349-01ND
2015-07-21M15-20349-05ND
2015-10-14M15-25337-03ND
2015-10-14M15-25337-01ND
2015-10-14M15-25337-05ND