1,4-Dioxane
Lca Wlsa Central Division
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 | 0.0439 ppb | 30 | 12 | ND - 0.230 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 |
---|---|---|
2014-03-05 | 14022330-02 | 0.190 ppb |
2014-03-05 | 14022330-06 | ND |
2014-03-05 | 14022330-05 | ND |
2014-03-05 | 1422330-04 | ND |
2014-03-05 | 14022330-03 | ND |
2014-03-12 | 35132081006AM | 0.0740 ppb |
2014-03-12 | 35132081007AM | ND |
2014-03-12 | 35132081002AM | 0.0760 ppb |
2014-03-12 | 35132081003AM | ND |
2014-03-12 | 35132081004AM | ND |
2014-03-12 | 35132081005AM | ND |
2014-03-12 | 35132081001AM | 0.0720 ppb |
2014-03-26 | 35132081008AM | 0.0840 ppb |
2014-03-26 | 35132081013AM | ND |
2014-06-04 | 14052990-02 | 0.170 ppb |
2014-09-10 | 14082856-01 | 0.0800 ppb |
2014-09-10 | 14082844-01 | ND |
2014-09-10 | 14082842-01 | 0.0900 ppb |
2014-09-10 | 14082843-01 | ND |
2014-09-10 | 14082845-01 | ND |
2014-09-10 | 14082847-01 | 0.0700 ppb |
2014-09-11 | 14082848-01 | ND |
2014-09-24 | 14082854-01 | ND |
2014-09-24 | 14082852-01 | ND |
2014-09-24 | 14082851-01 | ND |
2014-09-24 | 14082855-01 | ND |
2014-09-24 | 14082850-01 | 0.230 ppb |
2014-09-24 | 14082849-01 | ND |
2014-11-11 | 14082846-01 | 0.1000 ppb |
2014-12-11 | 14112877-01 | 0.0800 ppb |