1,4-Dioxane
Waipahu-Ewa-Waianae
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 | ND | 17 | 0 | ND |
| 2014 | ND | 21 | 0 | ND |
| 2015 | ND | 1 | 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 |
|---|---|---|
| 2013-07-01 | 201307030716AM | ND |
| 2013-07-01 | 201307030663AM | ND |
| 2013-07-01 | 201307030685AM | ND |
| 2013-07-01 | 201307030712AM | ND |
| 2013-07-01 | 201307030687AM | ND |
| 2013-07-01 | 201307030661AM | ND |
| 2013-07-01 | 201307030714AM | ND |
| 2013-07-05 | 201307090226AM | ND |
| 2013-07-05 | 201307090228AM | ND |
| 2013-07-05 | 201307090222AM | ND |
| 2013-07-08 | 201307100910AM | ND |
| 2013-07-08 | 201307100908AM | ND |
| 2013-07-08 | 201307100914AM | ND |
| 2013-07-08 | 201307100916AM | ND |
| 2013-07-08 | 201307100912AM | ND |
| 2013-07-09 | 201307110697AM | ND |
| 2013-07-09 | 201307110695AM | ND |
| 2014-01-03 | 201401070165AM | ND |
| 2014-01-04 | 201401070157AM | ND |
| 2014-01-05 | 201401070162AM | ND |
| 2014-01-06 | 201401080575AM | ND |
| 2014-01-06 | 201401080569AM | ND |
| 2014-01-06 | 201401080573AM | ND |
| 2014-01-06 | 201401080571AM | ND |
| 2014-01-07 | 201401090458AM | ND |
| 2014-01-07 | 201401090460AM | ND |
| 2014-01-08 | 201401100236AM | ND |
| 2014-01-08 | 201401100234AM | ND |
| 2014-01-10 | 201401140236AM | ND |
| 2014-01-10 | 201401140240AM | ND |
| 2014-01-10 | 201401140234AM | ND |
| 2014-01-11 | 201401140238AM | ND |
| 2014-01-12 | 201401140232AM | ND |
| 2014-01-13 | 201401150384AM | ND |
| 2014-01-14 | 201401160432AM | ND |
| 2014-06-04 | 201406100325AM | ND |
| 2014-06-16 | 201406180445AM | ND |
| 2014-07-15 | 201407170579AM | ND |
| 2015-01-13 | 201501150509AM | ND |