1,4-Dioxane
Enterprise Water Works
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 |
|---|---|---|---|---|
| 2014 | ND | 17 | 0 | ND |
| 2015 | ND | 17 | 0 | ND |
| 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 |
|---|---|---|
| 2014-09-25 | 35157120028AM | ND |
| 2014-09-25 | 35157120024AM | ND |
| 2014-09-25 | 35157120006AM | ND |
| 2014-09-25 | 35157120014AM | ND |
| 2014-09-25 | 35157120010AM | ND |
| 2014-09-25 | 35157120018AM | ND |
| 2014-09-25 | 35157120032AM | ND |
| 2014-09-25 | 35157120001AM | ND |
| 2014-09-25 | 35157120020AM | ND |
| 2014-09-25 | 35157120016AM | ND |
| 2014-09-26 | 35157120008AM | ND |
| 2014-09-26 | 35157120012AM | ND |
| 2014-09-26 | 35157120034AM | ND |
| 2014-09-26 | 35157120030AM | ND |
| 2014-09-26 | 35157120022AM | ND |
| 2014-09-26 | 35157120003AM | ND |
| 2014-09-26 | 35157120026AM | ND |
| 2015-03-09 | 35178873013AM | ND |
| 2015-03-09 | 35178873015AM | ND |
| 2015-03-09 | 35178873033AM | ND |
| 2015-03-09 | 35178873031AM | ND |
| 2015-03-09 | 35178873025AM | ND |
| 2015-03-09 | 35178873001AM | ND |
| 2015-03-09 | 35178873019AM | ND |
| 2015-03-09 | 35178873007AM | ND |
| 2015-03-09 | 35178873017AM | ND |
| 2015-03-09 | 35178873009AM | ND |
| 2015-03-09 | 35178873027AM | ND |
| 2015-03-09 | 35178873011AM | ND |
| 2015-03-09 | 35178873023AM | ND |
| 2015-03-09 | 35178873021AM | ND |
| 2015-03-09 | 35178873003AM | ND |
| 2015-03-09 | 35178873005AM | ND |
| 2015-03-09 | 35178873029AM | ND |