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EWG's Tap Water Database — 2021 UPDATE

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1,4-Dioxane

United Water New York

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.

MORE ABOUT THIS CONTAMINANT

 

73

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0269 ppb599ND - 0.500 ppb
20150.0204 ppb143ND - 0.130 ppb
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/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
2014-01-29201401300199AMND
2014-02-25201402260685AM0.0860 ppb
2014-02-25201402260622AM0.110 ppb
2014-03-12201403130199AMND
2014-03-12201403130211AMND
2014-03-13201403140158AM0.430 ppb
2014-04-03201404040247AMND
2014-04-03201404040249AMND
2014-04-09201404100834AMND
2014-04-09201404100804AMND
2014-04-10201404120066AMND
2014-04-10201404120081AMND
2014-04-21201404220351AMND
2014-04-22201404230464AMND
2014-04-24201404250193AMND
2014-04-24201404250164AMND
2014-04-24201404250178AMND
2014-04-24201404250191AMND
2014-04-29201404300619AMND
2014-04-30201405010472AMND
2014-05-08201405090500AMND
2014-05-22201405230213AMND
2014-05-22201405230215AMND
2014-05-28201405290396AM0.0840 ppb
2014-06-19201406200371AMND
2014-07-08201407090781AMND
2014-07-08201407090899AMND
2014-08-11201408120487AMND
2014-08-11201408120565AMND
2014-09-22201409230414AMND
2014-09-22201409230444AM0.500 ppb
2014-09-22201409230471AMND
2014-09-24201409250621AMND
2014-09-24201409250604AM0.0810 ppb
2014-10-07201410080609AMND
2014-10-07201410080606AMND
2014-10-14201410150233AMND
2014-10-14201410150322AMND
2014-10-14201410150286AMND
2014-10-15201410160400AMND
2014-10-15201410160395AMND
2014-10-21201410220429AM0.130 ppb
2014-10-27201410280617AMND
2014-10-27201410280529AM0.0710 ppb
2014-11-05201411060319AMND
2014-11-05201411060357AMND
2014-11-05201411060353AMND
2014-11-05201411060337AMND
2014-11-06201411070400AMND
2014-11-06201411070461AMND
2014-11-06201411070463AMND
2014-11-06201411070563AMND
2014-11-12201411130932AMND
2014-11-13201411150139AMND
2014-11-18201411190541AMND
2014-11-18201411190537AMND
2014-11-20201411210472AM0.0950 ppb
2014-11-20201411210451AMND
2014-12-10201412110670AMND
2015-01-29201501300107AMND
2015-05-20201505210482AMND
2015-05-20201505210593AMND
2015-05-20201505210542AMND
2015-05-20201505210564AMND
2015-06-17201506180448AMND
2015-06-17201506190045AMND
2015-06-17201506180531AM0.0720 ppb
2015-06-25201506260205AM0.130 ppb
2015-08-27201508280305AM0.0830 ppb
2015-09-09201509100846AMND
2015-09-09201509100840AMND
2015-09-10201509120165AMND
2015-10-01201510020407AMND