Know Your Environment. Protect Your Health.

1,4-Dioxane

City of Tumwater

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
2014ND60ND
2015ND60ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2014-08-13WA97-SE1-14-15517-35911ND
2014-08-13WA97-SE1-14-15517-35910ND
2014-08-13WA97-SE1-14-15517-35908ND
2014-08-13WA97-SE1-14-15517-35909ND
2014-08-13WA97-SE1-14-15517-35907ND
2014-08-20WA97-SE1-14-16401-37916ND
2015-02-11WA97-SE2-15-02700-6361ND
2015-02-11WA97-SE2-15-02700-6359ND
2015-02-11WA97-SE1-15-02700-6358ND
2015-02-11WA97-SE2-15-02700-6360ND
2015-02-11WA97-SE1-15-02700-6357ND
2015-02-11WA97-SE1-15-02700-6356ND