1,4-Dioxane
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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 |
---|---|---|---|---|
2014 | 0.00542 ppb | 24 | 1 | ND - 0.130 ppb |
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 |
---|---|---|
2014-01-27 | 201401280213AM | ND |
2014-01-27 | 201401280230AM | ND |
2014-04-23 | 201404240446AM | ND |
2014-04-23 | 201404240478AM | ND |
2014-04-23 | 201404240561AM | 0.130 ppb |
2014-04-29 | 201404300778AM | ND |
2014-04-29 | 201404300473AM | ND |
2014-04-29 | 201404300479AM | ND |
2014-04-29 | 201404300466AM | ND |
2014-04-30 | 201405010395AM | ND |
2014-04-30 | 201405010475AM | ND |
2014-04-30 | 201405010391AM | ND |
2014-07-29 | 201407300313AM | ND |
2014-07-29 | 201407300233AM | ND |
2014-10-06 | 201410070313AM | ND |
2014-10-06 | 201410070321AM | ND |
2014-10-07 | 201410080467AM | ND |
2014-10-07 | 201410080463AM | ND |
2014-10-09 | 201410100267AM | ND |
2014-10-09 | 201410100225AM | ND |
2014-10-14 | 201410150227AM | ND |
2014-10-14 | 201410150249AM | ND |
2014-10-15 | 201410160378AM | ND |
2014-10-15 | 201410160328AM | ND |