1,4-Dioxane
Edina
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.0550 ppb | 4 | 1 | ND - 0.220 ppb |
| 2014 | 0.111 ppb | 3 | 2 | ND - 0.260 ppb |
| 2015 | ND | 1 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | 0.372 ppb | 13 | 11 | ND - 0.860 ppb |
| 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 |
|---|---|---|
| 2013-07-25 | 1039552006 | ND |
| 2013-07-25 | 1039552003 | ND |
| 2013-07-25 | 1039552009 | 0.220 ppb |
| 2013-09-25 | 1310539-01 | ND |
| 2014-01-29 | 1069551006 | 0.0740 ppb |
| 2014-01-29 | 1069551009 | 0.260 ppb |
| 2014-01-29 | 1069551003 | ND |
| 2015-06-24 | 2079084001 | ND |
| 2017-02-07 | 17B0344-02 | ND |
| 2017-02-07 | 17B0344-03 | 0.510 ppb |
| 2017-02-07 | 17B0344-04 | 0.600 ppb |
| 2017-02-07 | 17B0344-01 | 0.230 ppb |
| 2017-04-13 | 17D0836-01 | 0.510 ppb |
| 2017-04-13 | 17D0836-02 | ND |
| 2017-04-13 | 17D0836-03 | 0.860 ppb |
| 2017-05-15 | 17E1214-01 | 0.120 ppb |
| 2017-07-26 | 17G1826-01 | 0.0980 ppb |
| 2017-07-26 | 17G1826-03 | 0.430 ppb |
| 2017-07-26 | 17G1826-04 | 0.520 ppb |
| 2017-12-19 | 17L0684-01 | 0.500 ppb |
| 2017-12-19 | 17L0684-02 | 0.460 ppb |