1,4-Dioxane
City of Madera
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.0138 ppb | 33 | 3 | ND - 0.200 ppb |
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 |
---|---|---|
2014-03-20 | A4C0742-33A | ND |
2014-03-20 | A4C0742-05A | ND |
2014-03-20 | A4C0742-25A | ND |
2014-03-20 | A4C0742-19A | ND |
2014-03-20 | A4C0742-31A | ND |
2014-03-20 | A4C0742-07A | ND |
2014-03-20 | A4C0742-29A | ND |
2014-03-20 | A4C0742-01A | ND |
2014-03-20 | A4C0742-35A | ND |
2014-03-20 | A4C0742-09A | ND |
2014-03-20 | A4C0742-17A | ND |
2014-03-20 | A4C0742-11A | 0.180 ppb |
2014-03-20 | A4C0742-23A | ND |
2014-03-20 | A4C0742-21A | ND |
2014-03-20 | A4C0742-03A | ND |
2014-03-20 | A4C0742-27A | ND |
2014-03-20 | A4C0742-15A | ND |
2014-09-25 | A4I0631-22A | ND |
2014-09-25 | A4I0631-25A | ND |
2014-09-25 | A4I0631-07A | ND |
2014-09-25 | A4I0631-16A | 0.200 ppb |
2014-09-25 | A4I0631-19A | ND |
2014-09-25 | A4I0631-13A | ND |
2014-09-25 | A4I0631-04A | ND |
2014-09-25 | A4I0631-01A | ND |
2014-09-25 | A4I0631-10A | 0.0750 ppb |
2014-09-25 | A4I0631-43A | ND |
2014-09-25 | A4I0631-40A | ND |
2014-09-25 | A4I0631-46A | ND |
2014-09-25 | A4I0631-28A | ND |
2014-09-25 | A4I0631-31A | ND |
2014-09-25 | A4I0631-34A | ND |
2014-09-25 | A4I0631-37A | ND |