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EWG's Tap Water Database — 2019 UPDATE

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1,4-Dioxane

Sun Valley Gid

NOTE: Sun Valley Gid purchases water from Truckee Meadows Water Authority which is required to test for 1,4-dioxane. Sample information shown below was taken by Truckee Meadows Water Authority.

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.

 

41

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
2013ND40ND
2014ND100ND
2015N/A00N/A
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

NOTE: Sun Valley Gid purchases water from Truckee Meadows Water Authority which is required to test for 1,4-dioxane. Sample information shown below was taken by Truckee Meadows Water Authority.

Date Lab ID Result
2013-05-20201305210275AMND
2013-05-20201305210066AMND
2013-05-20201305210061AMND
2013-05-20201305210059AM0.0930 ppb
2013-05-22201305230338AMND
2013-05-22201305230342AMND
2013-05-22201305230289AMND
2013-05-22201305230335AM0.300 ppb
2013-06-04201306050182AMND
2013-06-04201306050241AMND
2013-06-11201306120172AMND
2013-06-11201306120213AMND
2013-06-11201306120163AM0.0870 ppb
2013-06-11201306120227AMND
2013-06-11201306120229AMND
2013-06-11201306120169AMND
2013-06-19201306200241AMND
2013-06-19201306200250AMND
2013-06-19201306200243AMND
2013-06-19201306200239AMND
2013-06-19201306200126AMND
2013-06-19201306200268AMND
2013-06-19201306200237AMND
2013-06-24201306250077AMND
2013-06-25201306260231AMND
2013-06-25201306260226AMND
2013-06-27201306280176AMND
2013-09-17201309200263AM0.0940 ppb
2013-09-17201309200267AMND
2013-11-25201311270060AMND
2013-12-16201312180499AMND
2014-03-05201403070313AMND
2014-04-22201404250176AMND
2014-04-22201404250189AMND
2014-04-22201404250162AMND
2014-04-22201404250157AMND
2014-04-29201405020257AMND
2014-04-29201405020173AMND
2014-04-29201405020169AMND
2014-04-29201405020265AMND
2014-06-09201406110932AMND