1,4-Dioxane
Daphne
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 | ND | 14 | 0 | ND |
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 |
---|---|---|
2013-02-18 | 2782925 | ND |
2013-02-18 | 2783347 | ND |
2013-02-18 | 2782954 | ND |
2013-02-18 | 2782972 | ND |
2013-02-18 | 2782963 | ND |
2013-02-19 | 2782934 | ND |
2013-02-19 | 2782945 | ND |
2013-08-22 | 2885983 | ND |
2013-08-22 | 2885971 | ND |
2013-08-22 | 2886013 | ND |
2013-08-22 | 2886024 | ND |
2013-08-22 | 2886211 | ND |
2013-08-22 | 2885962 | ND |
2013-10-14 | 2914484 | ND |