Menu

EWG's Tap Water Database

Donate

1,4-Dioxane

East Cherry Creek Valley Water and Sanitation 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.

 

22

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
20140.00327 ppb221ND - 0.0720 ppb
2015N/A00N/A

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 Result
2014-02-10ND
2014-02-10ND
2014-02-10ND
2014-02-10ND
2014-02-11ND
2014-02-24ND
2014-02-24ND
2014-02-24ND
2014-02-26ND
2014-02-26ND
2014-05-120.0720 ppb
2014-08-12ND
2014-08-13ND
2014-08-14ND
2014-08-19ND
2014-08-19ND
2014-08-21ND
2014-08-25ND
2014-08-26ND
2014-08-26ND
2014-08-26ND
2014-11-10ND