Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

1,4-Dioxane

City of Buena Park

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

 

97

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0216 ppb191ND - 0.410 ppb
2014ND150ND
2015ND170ND
2016ND150ND
2017ND130ND
2018ND90ND
2019ND90ND

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
2013-01-073010003810ND
2013-01-073010003802ND
2013-01-083010003806ND
2013-01-083010003815ND
2013-01-083010003809ND
2013-01-083010003807ND
2013-01-083010003808ND
2013-03-043010003811ND
2013-06-103010003811-2ND
2013-07-093010003816-20.410 ppb
2013-07-093010003802-2ND
2013-07-093010003810-2ND
2013-07-093010003808-2ND
2013-07-113010003815-2ND
2013-07-113010003809-2ND
2013-07-113010003806-2ND
2013-07-113010003807-2ND
2013-09-033010003811-3ND
2013-12-093010003811-4ND
2014-04-224417-016-1020ND
2014-04-224417-017-0905ND
2014-04-224417-027-1000ND
2014-04-224417-012-1100ND
2014-04-244417-009-1030ND
2014-04-244417-008-0930ND
2014-04-244417-007-1005ND
2014-04-244417-004-1100ND
2014-10-274417-027-1030ND
2014-10-274417-016-1000ND
2014-10-274417-008-1105ND
2014-10-294417-017-1140ND
2014-10-294417-012-1110ND
2014-10-304417-004-1155ND
2014-10-304417-009-1135ND
2015-01-214417-027-0950ND
2015-04-144417-027-0910ND
2015-04-144417-016-0940ND
2015-04-154417-017-0920ND
2015-04-154417-004-1025ND
2015-04-154417-008-0940ND
2015-04-164417-012-1030ND
2015-04-164417-009-0945ND
2015-08-254417-007-0835ND
2015-10-214417-027-1130ND
2015-10-214417-004-1015ND
2015-10-214417-017-0835ND
2015-10-214417-007-0930ND
2015-10-214417-008-0900ND
2015-10-214417-009-0950ND
2015-10-214417-012-1035ND
2015-10-214417-016-1110ND
2016-04-264417-004-1150ND
2016-04-264417-007-1115ND
2016-04-264417-008-0950ND
2016-04-264417-009-1220ND
2016-04-264417-012-0825ND
2016-04-264417-016-1045ND
2016-04-264417-017-0915ND
2016-04-264417-027-1020ND
2016-10-104417-012-1330ND
2016-10-104417-027-0840ND
2016-10-104417-016-0825ND
2016-10-134417-009-1250ND
2016-10-134417-017-1200ND
2016-10-134417-008-1215ND
2016-10-134417-007-1235ND
2017-04-034417-027-0830ND
2017-04-064417-016-0930ND
2017-04-064417-007-1000ND
2017-04-064417-017-0815ND
2017-04-064417-008-0850ND
2017-04-064417-009-1030ND
2017-10-114417-017-0830ND
2017-10-114417-008-0900ND
2017-10-114417-027-0920ND
2017-10-114417-016-0945ND
2017-10-184417-009-0905ND
2017-10-184417-004-0935ND
2017-10-184417-007-0835ND
2018-01-224417-027-0840ND
2018-01-254417-008-0820ND
2018-01-254417-016-0900ND
2018-04-114417-009-1140ND
2018-04-114417-004-1210ND
2018-04-114417-007-1120ND
2018-04-194417-017-1105ND
2018-07-304417-016-1150ND
2018-07-304417-027-1125ND
2019-01-034417-027-0840ND
2019-01-214417-016-0920ND
2019-01-214417-017-0840ND
2019-01-234417-007-0930ND
2019-01-234417-004-1005ND
2019-01-234417-008-0900ND
2019-06-204417-009-1300ND
2019-07-224417-016-0930ND
2019-11-044417-027-0915ND