1,4-Dioxane
Town of Gilbert
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 | 34 | 0 | ND |
| 2014 | ND | 2 | 0 | ND |
| 2015 | ND | 2 | 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 |
|---|---|---|
| 2013-04-22 | 201304220129AM | ND |
| 2013-04-22 | 201304220127AM | ND |
| 2013-04-22 | 201304220125AM | ND |
| 2013-04-22 | 201304220110AM | ND |
| 2013-04-22 | 201304220123AM | ND |
| 2013-04-22 | 201304220108AM | ND |
| 2013-04-22 | 201304220119AM | ND |
| 2013-04-22 | 201304220121AM | ND |
| 2013-04-23 | 201304230213AM | ND |
| 2013-04-23 | 201304230215AM | ND |
| 2013-04-23 | 201304230211AM | ND |
| 2013-04-24 | 201304240157AM | ND |
| 2013-04-24 | 201304240159AM | ND |
| 2013-04-24 | 201304240155AM | ND |
| 2013-04-25 | 201304250474AM | ND |
| 2013-04-25 | 201304250476AM | ND |
| 2013-07-25 | 201307250331AM | ND |
| 2013-07-25 | 201307250327AM | ND |
| 2013-10-14 | 201310140284AM | ND |
| 2013-10-14 | 201310140278AM | ND |
| 2013-10-14 | 201310140288AM | ND |
| 2013-10-14 | 201310140286AM | ND |
| 2013-10-14 | 201310140276AM | ND |
| 2013-10-15 | 201310150548AM | ND |
| 2013-10-15 | 201310150552AM | ND |
| 2013-10-15 | 201310150550AM | ND |
| 2013-10-15 | 201310150546AM | ND |
| 2013-10-16 | 201310160451AM | ND |
| 2013-10-16 | 201310160453AM | ND |
| 2013-10-22 | 201310220324AM | ND |
| 2013-10-22 | 201310220322AM | ND |
| 2013-10-22 | 201310220320AM | ND |
| 2013-10-23 | 201310230754AM | ND |
| 2013-10-23 | 201310230756AM | ND |
| 2014-01-09 | 201401090391AM | ND |
| 2014-01-21 | 201401210278AM | ND |
| 2015-06-15 | 201506150309AM | ND |
| 2015-12-13 | 201512140112AM | ND |