1,4-Dioxane
City of Tucson
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | 0.00458 ppb | 48 | 1 | ND - 0.220 ppb |
2014 | N/A | 0 | 0 | N/A |
2015 | N/A | 0 | 0 | N/A |
2016 | N/A | 0 | 0 | N/A |
2017 | N/A | 0 | 0 | N/A |
2018 | N/A | 0 | 0 | N/A |
2019 | N/A | 0 | 0 | N/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 |
---|---|---|
2013-04-15 | 201304160052AM | ND |
2013-04-15 | 201304160050AM | ND |
2013-04-15 | 201304160054AM | ND |
2013-04-15 | 201304160056AM | ND |
2013-04-16 | 201304180590AM | 0.220 ppb |
2013-04-16 | 201304180588AM | ND |
2013-04-16 | 201304180586AM | ND |
2013-04-17 | 201304190462AM | ND |
2013-04-17 | 201304190460AM | ND |
2013-04-17 | 201304190458AM | ND |
2013-04-22 | 201304240203AM | ND |
2013-04-22 | 201304240201AM | ND |
2013-04-22 | 201304240197AM | ND |
2013-04-22 | 201304240199AM | ND |
2013-04-23 | 201304250523AM | ND |
2013-04-23 | 201304250525AM | ND |
2013-04-23 | 201304250529AM | ND |
2013-04-23 | 201304250527AM | ND |
2013-04-24 | 201304260164AM | ND |
2013-04-24 | 201304260162AM | ND |
2013-04-24 | 201304260166AM | ND |
2013-04-29 | 201305010449AM | ND |
2013-04-29 | 201305020190AM | ND |
2013-04-29 | 201305010451AM | ND |
2013-10-08 | 201310110331AM | ND |
2013-10-08 | 201310120150AM | ND |
2013-10-08 | 201310110333AM | ND |
2013-10-08 | 201310110337AM | ND |
2013-10-08 | 201310110335AM | ND |
2013-10-08 | 201310120152AM | ND |
2013-10-09 | 201310120160AM | ND |
2013-10-09 | 201310120156AM | ND |
2013-10-09 | 201310120154AM | ND |
2013-10-09 | 201310120158AM | ND |
2013-10-09 | 201310120162AM | ND |
2013-10-14 | 201310150058AM | ND |
2013-10-14 | 201310150054AM | ND |
2013-10-14 | 201310150052AM | ND |
2013-10-14 | 201310150056AM | ND |
2013-10-16 | 201310170122AM | ND |
2013-10-16 | 201310170124AM | ND |
2013-10-16 | 201310170118AM | ND |
2013-10-16 | 201310170126AM | ND |
2013-10-16 | 201310170120AM | ND |
2013-10-17 | 201310180357AM | ND |
2013-10-17 | 201310180359AM | ND |
2013-10-17 | 201310180355AM | ND |
2013-10-29 | 201310300082AM | ND |