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EWG's Tap Water Database — 2021 UPDATE

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1,4-Dioxane

Golden State Water Company - Cordova

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

 

174

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20130.0285 ppb132ND - 0.200 ppb
2014ND320ND
2015ND270ND
2016ND280ND
2017ND260ND
2018ND170ND
2019ND310ND

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
2013-06-18201306190218AMND
2013-06-18201306190229AMND
2013-06-18201306190216AMND
2013-06-18201306190220AMND
2013-06-18201306190231AMND
2013-06-18201306190225AM0.200 ppb
2013-09-17201309180511AMND
2013-09-17201309180507AMND
2013-12-10201312110705AMND
2013-12-10201312110724AMND
2013-12-10201312110691AMND
2013-12-10201312110709AMND
2013-12-10201312110877AM0.170 ppb
2014-01-142706-008-1050ND
2014-01-142706-010-1140ND
2014-01-142706-019-1020ND
2014-01-142706-022-0845ND
2014-01-142706-028-0920ND
2014-01-142706-029-1305ND
2014-01-142706-030-0945ND
2014-01-142706-051-1210ND
2014-03-25201403260381AMND
2014-03-25201403260334AMND
2014-04-022706-008-1340ND
2014-04-022706-019-1238ND
2014-04-022706-022-1240ND
2014-04-022706-028-1012ND
2014-04-022706-030-1307ND
2014-04-082706-010-1325ND
2014-04-082706-051-1350ND
2014-07-152706-008-1235ND
2014-07-152706-010-1314ND
2014-07-152706-019-1154ND
2014-07-152706-022-1105ND
2014-07-152706-028-1128ND
2014-07-152706-029-1410ND
2014-07-152706-030-1100ND
2014-07-152706-051-1328ND
2014-10-142706-008-1255ND
2014-10-142706-019-1203ND
2014-10-142706-022-1100ND
2014-10-142706-028-1114ND
2014-10-142706-030-1135ND
2014-10-212706-010-1055ND
2014-10-212706-051-1116ND
2015-01-132706-008-1109ND
2015-01-132706-010-1157ND
2015-01-132706-019-1023ND
2015-01-132706-022-0930ND
2015-01-132706-028-0940ND
2015-01-132706-030-0910ND
2015-01-132706-051-1233ND
2015-04-082706-008-1325ND
2015-04-082706-022-1110ND
2015-04-142706-010-1220ND
2015-04-142706-028-1300ND
2015-04-142706-030-1330ND
2015-04-142706-051-1135ND
2015-07-072706-008-0950ND
2015-07-072706-022-0900ND
2015-07-072706-051-1205ND
2015-07-212706-010-1215ND
2015-07-212706-019-1355ND
2015-07-212706-028-1315ND
2015-07-212706-030-1415ND
2015-10-062706-010-1235ND
2015-10-062706-022-0915ND
2015-10-062706-051-1155ND
2015-10-202706-008-1210ND
2015-10-202706-019-1120ND
2015-10-202706-028-1005ND
2015-10-202706-030-1040ND
2016-01-122706-008-1045ND
2016-01-122706-010-1345ND
2016-01-122706-019-1005ND
2016-01-122706-028-0935ND
2016-01-122706-030-0920ND
2016-01-202706-051-1150ND
2016-01-262706-022-1011ND
2016-04-052706-008-0950ND
2016-04-052706-022-0900ND
2016-04-122706-010-1155ND
2016-04-122706-019-1035ND
2016-04-122706-028-0915ND
2016-04-122706-030-0950ND
2016-04-122706-051-1225ND
2016-07-052706-008-1010ND
2016-07-052706-010-1055ND
2016-07-052706-022-0920ND
2016-07-122706-019-1300ND
2016-07-122706-028-1220ND
2016-07-122706-030-1245ND
2016-07-122706-051-0943ND
2016-09-202706-029-1305ND
2016-10-042706-008-1005ND
2016-10-042706-022-0920ND
2016-10-112706-010-1250ND
2016-10-112706-028-0940ND
2016-10-112706-030-1015ND
2016-10-182706-051-1200ND
2017-02-149590-008-1000ND
2017-02-149590-028-1313ND
2017-02-149590-030-1342ND
2017-02-239590-019-1040ND
2017-03-079590-051-1140ND
2017-04-259590-008-1110ND
2017-04-259590-019-1030ND
2017-04-259590-051-1150ND
2017-05-029590-028-1112ND
2017-05-059590-010-1405ND
2017-05-099590-030-1258ND
2017-05-259590-022-1010ND
2017-07-089590-022-1325ND
2017-07-189590-008-1218ND
2017-07-189590-010-1307ND
2017-07-189590-019-0729ND
2017-07-189590-028-0828ND
2017-07-189590-030-0750ND
2017-07-189590-051-1335ND
2017-10-109590-008-0923ND
2017-10-109590-010-1009ND
2017-10-109590-051-1044ND
2017-10-119590-022-1432ND
2017-10-179590-019-1122ND
2017-10-179590-028-0950ND
2017-10-179590-030-0938ND
2018-01-109590-019-1215ND
2018-07-109590-008-0927ND
2018-07-109590-010-0958ND
2018-07-109590-019-1057ND
2018-07-109590-022-0846ND
2018-07-109590-028-1134ND
2018-07-109590-030-1155ND
2018-07-109590-051-1020ND
2018-08-219590-029-1044ND
2018-10-099590-008-1129ND
2018-10-099590-010-1111ND
2018-10-099590-019-1421ND
2018-10-099590-028-1321ND
2018-10-099590-030-1346ND
2018-10-099590-051-1036ND
2018-11-069590-022-0905ND
2018-11-209590-029-1129ND
2019-01-089590-008-0943ND
2019-01-089590-019-1430ND
2019-01-089590-029-1047ND
2019-01-159590-010-1254ND
2019-01-159590-022-0836ND
2019-01-159590-028-1047ND
2019-01-159590-030-1018ND
2019-01-159590-051-1325ND
2019-04-099590-008-0949ND
2019-04-099590-010-1230ND
2019-04-099590-022-0918ND
2019-04-099590-028-0757ND
2019-04-099590-029-1049ND
2019-04-099590-030-0825ND
2019-04-099590-051-1151ND
2019-04-169590-019-1026ND
2019-07-099590-008-1325ND
2019-07-099590-010-1445ND
2019-07-099590-019-1025ND
2019-07-099590-028-0935ND
2019-07-099590-029-1245ND
2019-07-099590-030-0902ND
2019-07-099590-051-1358ND
2019-07-239590-022-0800ND
2019-10-089590-008-0953ND
2019-10-089590-010-1031ND
2019-10-089590-019-1311ND
2019-10-089590-022-0810ND
2019-10-089590-028-1211ND
2019-10-089590-030-1236ND
2019-10-089590-051-1105ND