1,4-Dioxane
East Casey County Water District
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 | ND | 20 | 0 | ND |
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 |
---|---|---|
2014-02-20 | M14-12126-01 | ND |
2014-02-20 | M14-12130-01 | ND |
2014-02-20 | M14-12129-01 | ND |
2014-02-20 | M14-12127-01 | ND |
2014-02-21 | M14-12128-01 | ND |
2014-05-19 | M14-16336-01 | ND |
2014-05-19 | M14-16335-01 | ND |
2014-05-19 | M14-16339-01 | ND |
2014-05-19 | M14-16338-01 | ND |
2014-05-20 | M14-16337-01 | ND |
2014-08-19 | M14-21436-01 | ND |
2014-08-19 | M14-21434-01 | ND |
2014-08-19 | M14-21435-01 | ND |
2014-08-19 | M14-21433-01 | ND |
2014-08-20 | M14-21432-01 | ND |
2014-11-12 | M14-25713-01 | ND |
2014-11-12 | M14-25714-01 | ND |
2014-11-12 | M14-25711-01 | ND |
2014-11-12 | M14-25715-01 | ND |
2014-11-13 | M14-25712-01 | ND |