1,4-Dioxane
City of Biloxi
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 | 13 | 0 | ND |
| 2014 | ND | 13 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2013-10-21 | 754009-10160 | ND |
| 2013-10-21 | 754001-10160 | ND |
| 2013-10-21 | 754030-10194 | ND |
| 2013-10-21 | 754020-10194 | ND |
| 2013-10-21 | 754022-10194 | ND |
| 2013-10-21 | 754003-10160 | ND |
| 2013-10-21 | 754018-10194 | ND |
| 2013-10-21 | 754016-10194 | ND |
| 2013-10-21 | 754007-10160 | ND |
| 2013-10-21 | 754024-10194 | ND |
| 2013-10-21 | 754026-10194 | ND |
| 2013-10-21 | 754005-10160 | ND |
| 2013-11-13 | 758659-10316 | ND |
| 2014-04-22 | 781966-11223 | ND |
| 2014-04-22 | 781912-11223 | ND |
| 2014-04-22 | 781962-11223 | ND |
| 2014-04-22 | 781940-11223 | ND |
| 2014-04-22 | 781968-11223 | ND |
| 2014-04-22 | 781910-11223 | ND |
| 2014-04-22 | 781932-11223 | ND |
| 2014-04-22 | 781908-11223 | ND |
| 2014-04-22 | 781934-11223 | ND |
| 2014-04-22 | 781970-11236 | ND |
| 2014-04-22 | 781930-11223 | ND |
| 2014-04-22 | 781960-11223 | ND |
| 2014-05-05 | 783994-11306 | ND |