1,4-Dioxane
Aquarion Water - NH
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 | 8 | 0 | ND |
| 2015 | ND | 8 | 0 | ND |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 7 | 0 | ND |
| 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 |
|---|---|---|
| 2014-09-15 | 201409160286AM | ND |
| 2014-09-15 | 201409160300AM | ND |
| 2014-09-15 | 201409160387AM | ND |
| 2014-11-12 | 201411130701AM | ND |
| 2014-11-12 | 201411130700AM | ND |
| 2014-11-12 | 201411130712AM | ND |
| 2014-11-12 | 201411130691AM | ND |
| 2014-11-12 | 201411130697AM | ND |
| 2015-03-10 | 201503110748AM | ND |
| 2015-03-10 | 201503110753AM | ND |
| 2015-03-10 | 201503110656AM | ND |
| 2015-03-11 | 201503120722AM | ND |
| 2015-03-11 | 201503120677AM | ND |
| 2015-03-11 | 201503120695AM | ND |
| 2015-03-11 | 201503120711AM | ND |
| 2015-04-07 | 201504080518AM | ND |
| 2018-05-30 | B802990004 | ND |
| 2018-05-30 | B802990003 | ND |
| 2018-05-30 | B802990002 | ND |
| 2018-05-30 | B802990001 | ND |
| 2018-12-17 | B810254003 | ND |
| 2018-12-17 | B810254002 | ND |
| 2018-12-17 | B810254001 | ND |