1,4-Dioxane
Aqua Pa Bensalem
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 | 0.264 ppb | 9 | 3 | ND - 2.20 ppb |
| 2015 | 0.0727 ppb | 3 | 2 | ND - 0.140 ppb |
| 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 |
|---|---|---|
| 2014-05-21 | 201405240050AM | 0.0750 ppb |
| 2014-05-23 | 201405240048AM | ND |
| 2014-05-23 | 201405240059AM | ND |
| 2014-08-27 | 201408290803AM | ND |
| 2014-08-27 | 201408300029 | ND |
| 2014-08-27 | 201408290806AM | ND |
| 2014-11-19 | 201411210528AM | 2.20 ppb |
| 2014-11-21 | 201411250576AM | ND |
| 2014-11-21 | 201411250588AM | 0.1000 ppb |
| 2015-02-18 | 201502200338AM | ND |
| 2015-02-18 | 201502200347AM | 0.140 ppb |
| 2015-02-20 | 201502250797AM | 0.0780 ppb |