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EWG's Tap Water Database — 2019 UPDATE

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1,4-Dioxane

Town of Gilbert

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.

 

38

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
2013ND340ND
2014ND20ND
2015ND20ND
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
2013-04-22201304220129AMND
2013-04-22201304220127AMND
2013-04-22201304220125AMND
2013-04-22201304220110AMND
2013-04-22201304220123AMND
2013-04-22201304220108AMND
2013-04-22201304220119AMND
2013-04-22201304220121AMND
2013-04-23201304230213AMND
2013-04-23201304230215AMND
2013-04-23201304230211AMND
2013-04-24201304240157AMND
2013-04-24201304240159AMND
2013-04-24201304240155AMND
2013-04-25201304250474AMND
2013-04-25201304250476AMND
2013-07-25201307250331AMND
2013-07-25201307250327AMND
2013-10-14201310140284AMND
2013-10-14201310140278AMND
2013-10-14201310140288AMND
2013-10-14201310140286AMND
2013-10-14201310140276AMND
2013-10-15201310150548AMND
2013-10-15201310150552AMND
2013-10-15201310150550AMND
2013-10-15201310150546AMND
2013-10-16201310160451AMND
2013-10-16201310160453AMND
2013-10-22201310220324AMND
2013-10-22201310220322AMND
2013-10-22201310220320AMND
2013-10-23201310230754AMND
2013-10-23201310230756AMND
2014-01-09201401090391AMND
2014-01-21201401210278AMND
2015-06-15201506150309AMND
2015-12-13201512140112AMND